mfd: timberdale: Move GPIO_NR_PINS into the driver

This symbol is only used inside the Timberdale MFD driver. Move into
the .c file as there's no need for it to be exposed in a header.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260327-gpio-timberdale-swnode-v3-1-9a1bc1b2b124@oss.qualcomm.com
Signed-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/timberdale.c

@@ -37,6 +37,8 @@
 
 #define DRIVER_NAME "timberdale"
 
+#define GPIO_NR_PINS	16
+
 struct timberdale_device {
 	resource_size_t		ctl_mapbase;
 	unsigned char __iomem   *ctl_membase;

drivers/mfd/timberdale.h

@@ -113,7 +113,6 @@
 #define GPIO_PIN_ASCB		8
 #define GPIO_PIN_INIC_RST	14
 #define GPIO_PIN_BT_RST		15
-#define GPIO_NR_PINS		16
 
 /* DMA Channels */
 #define DMA_UART_RX         0