spi: pxa2xx: Don't provide struct chip_data for others

Now the struct chip_data is local to spi-pxa2xx.c, move
its definition to the C file. This will slightly speed up
a build and also hide badly named data type (too generic).
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240417110334.2671228-10-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx.c

@@ -66,6 +66,14 @@ MODULE_ALIAS("platform:pxa2xx-spi");
 				| CE4100_SSCR1_RFT | CE4100_SSCR1_TFT | SSCR1_MWDS \
 				| SSCR1_SPH | SSCR1_SPO | SSCR1_LBM)
 
+struct chip_data {
+	u32 cr1;
+	u32 dds_rate;
+	u32 threshold;
+	u16 lpss_rx_threshold;
+	u16 lpss_tx_threshold;
+};
+
 #define LPSS_GENERAL_REG_RXTO_HOLDOFF_DISABLE	BIT(24)
 #define LPSS_CS_CONTROL_SW_MODE			BIT(0)
 #define LPSS_CS_CONTROL_CS_HIGH			BIT(1)

drivers/spi/spi-pxa2xx.h

@@ -75,14 +75,6 @@ struct driver_data {
 	struct gpio_desc *gpiod_ready;
 };
 
-struct chip_data {
-	u32 cr1;
-	u32 dds_rate;
-	u32 threshold;
-	u16 lpss_rx_threshold;
-	u16 lpss_tx_threshold;
-};
-
 static inline u32 pxa2xx_spi_read(const struct driver_data *drv_data, u32 reg)
 {
 	return pxa_ssp_read_reg(drv_data->ssp, reg);