net: dsa: sja1105: Build PTP support in main DSA driver

As Arnd Bergmann pointed out in commit 78fe8a28 ("net: dsa: sja1105:
fix ptp link error"), there is no point in having PTP support as a
separate loadable kernel module.

So remove the exported symbols and make sja1105.ko contain PTP support
or not based on CONFIG_NET_DSA_SJA1105_PTP.
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/sja1105/Makefile

@@ -10,5 +10,5 @@ sja1105-objs := \
     sja1105_dynamic_config.o \
 
 ifdef CONFIG_NET_DSA_SJA1105_PTP
-obj-$(CONFIG_NET_DSA_SJA1105) += sja1105_ptp.o
+sja1105-objs += sja1105_ptp.o
 endif

drivers/net/dsa/sja1105/sja1105_ptp.c

@@ -77,7 +77,6 @@ int sja1105_get_ts_info(struct dsa_switch *ds, int port,
 	info->phc_index = ptp_clock_index(priv->clock);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(sja1105_get_ts_info);
 
 int sja1105et_ptp_cmd(const void *ctx, const void *data)
 {
@@ -95,7 +94,6 @@ int sja1105et_ptp_cmd(const void *ctx, const void *data)
 	return sja1105_spi_send_packed_buf(priv, SPI_WRITE, regs->ptp_control,
 					   buf, SJA1105_SIZE_PTP_CMD);
 }
-EXPORT_SYMBOL_GPL(sja1105et_ptp_cmd);
 
 int sja1105pqrs_ptp_cmd(const void *ctx, const void *data)
 {
@@ -113,7 +111,6 @@ int sja1105pqrs_ptp_cmd(const void *ctx, const void *data)
 	return sja1105_spi_send_packed_buf(priv, SPI_WRITE, regs->ptp_control,
 					   buf, SJA1105_SIZE_PTP_CMD);
 }
-EXPORT_SYMBOL_GPL(sja1105pqrs_ptp_cmd);
 
 /* The switch returns partial timestamps (24 bits for SJA1105 E/T, which wrap
  * around in 0.135 seconds, and 32 bits for P/Q/R/S, wrapping around in 34.35
@@ -146,7 +143,6 @@ u64 sja1105_tstamp_reconstruct(struct sja1105_private *priv, u64 now,
 
 	return ts_reconstructed;
 }
-EXPORT_SYMBOL_GPL(sja1105_tstamp_reconstruct);
 
 /* Reads the SPI interface for an egress timestamp generated by the switch
  * for frames sent using management routes.
@@ -219,7 +215,6 @@ int sja1105_ptpegr_ts_poll(struct sja1105_private *priv, int port, u64 *ts)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(sja1105_ptpegr_ts_poll);
 
 int sja1105_ptp_reset(struct sja1105_private *priv)
 {
@@ -240,7 +235,6 @@ int sja1105_ptp_reset(struct sja1105_private *priv)
 
 	return rc;
 }
-EXPORT_SYMBOL_GPL(sja1105_ptp_reset);
 
 static int sja1105_ptp_gettime(struct ptp_clock_info *ptp,
 			       struct timespec64 *ts)
@@ -387,7 +381,6 @@ int sja1105_ptp_clock_register(struct sja1105_private *priv)
 
 	return sja1105_ptp_reset(priv);
 }
-EXPORT_SYMBOL_GPL(sja1105_ptp_clock_register);
 
 void sja1105_ptp_clock_unregister(struct sja1105_private *priv)
 {
@@ -397,8 +390,3 @@ void sja1105_ptp_clock_unregister(struct sja1105_private *priv)
 	ptp_clock_unregister(priv->clock);
 	priv->clock = NULL;
 }
-EXPORT_SYMBOL_GPL(sja1105_ptp_clock_unregister);
-
-MODULE_AUTHOR("Vladimir Oltean <olteanv@gmail.com>");
-MODULE_DESCRIPTION("SJA1105 PHC Driver");
-MODULE_LICENSE("GPL v2");

drivers/net/dsa/sja1105/sja1105_spi.c

@@ -100,7 +100,6 @@ int sja1105_spi_send_packed_buf(const struct sja1105_private *priv,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(sja1105_spi_send_packed_buf);
 
 /* If @rw is:
  * - SPI_WRITE: creates and sends an SPI write message at absolute
@@ -136,7 +135,6 @@ int sja1105_spi_send_int(const struct sja1105_private *priv,
 
 	return rc;
 }
-EXPORT_SYMBOL_GPL(sja1105_spi_send_int);
 
 /* Should be used if a @packed_buf larger than SJA1105_SIZE_SPI_MSG_MAXLEN
  * must be sent/received. Splitting the buffer into chunks and assembling

drivers/net/dsa/sja1105/sja1105_static_config.c

@@ -35,7 +35,6 @@ void sja1105_pack(void *buf, const u64 *val, int start, int end, size_t len)
 	}
 	dump_stack();
 }
-EXPORT_SYMBOL_GPL(sja1105_pack);
 
 void sja1105_unpack(const void *buf, u64 *val, int start, int end, size_t len)
 {
@@ -53,7 +52,6 @@ void sja1105_unpack(const void *buf, u64 *val, int start, int end, size_t len)
 		       start, end);
 	dump_stack();
 }
-EXPORT_SYMBOL_GPL(sja1105_unpack);
 
 void sja1105_packing(void *buf, u64 *val, int start, int end,
 		     size_t len, enum packing_op op)
@@ -76,7 +74,6 @@ void sja1105_packing(void *buf, u64 *val, int start, int end,
 	}
 	dump_stack();
 }
-EXPORT_SYMBOL_GPL(sja1105_packing);
 
 /* Little-endian Ethernet CRC32 of data packed as big-endian u32 words */
 u32 sja1105_crc32(const void *buf, size_t len)