wifi: cw1200: fix __le16 sparse warnings

Sparse warns:

drivers/net/wireless/st/cw1200/cw1200_spi.c:83:17:    got restricted __le16 [usertype]
drivers/net/wireless/st/cw1200/cw1200_spi.c:148:17: warning: incorrect type in assignment (different base types)
drivers/net/wireless/st/cw1200/cw1200_spi.c:148:17:    expected unsigned short [addressable] [assigned] [usertype] regaddr
drivers/net/wireless/st/cw1200/cw1200_spi.c:148:17:    got restricted __le16 [usertype]

These cpu_to_le16() calls are not really making any sense to me. On a big
endian system we first convert regaddr from big to little using cpu_to_le16()
but immediately after we convert them back to big endian? So just remove them.

Compile tested only.
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240130151556.2315951-4-kvalo@kernel.org

drivers/net/wireless/st/cw1200/cw1200_spi.c

@@ -79,9 +79,6 @@ static int cw1200_spi_memcpy_fromio(struct hwbus_priv *self,
 	pr_info("READ : %04d from 0x%02x (%04x)\n", count, addr, regaddr);
 #endif
 
-	/* Header is LE16 */
-	regaddr = cpu_to_le16(regaddr);
-
 	/* We have to byteswap if the SPI bus is limited to 8b operation
 	   or we are running on a Big Endian system
 	*/
@@ -144,9 +141,6 @@ static int cw1200_spi_memcpy_toio(struct hwbus_priv *self,
 	pr_info("WRITE: %04d  to  0x%02x (%04x)\n", count, addr, regaddr);
 #endif
 
-	/* Header is LE16 */
-	regaddr = cpu_to_le16(regaddr);
-
 	/* We have to byteswap if the SPI bus is limited to 8b operation
 	   or we are running on a Big Endian system
 	*/