gpio: stm32f7: Move STM32_GPIOS_PER_BANK into gpio.h

To allow access to this define by other driver, move
it into gpio.h

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/include/asm/arch-stm32/gpio.h b/arch/arm/include/asm/arch-stm32/gpio.h
index 8ba15b7..570e80a 100644
--- a/arch/arm/include/asm/arch-stm32/gpio.h
+++ b/arch/arm/include/asm/arch-stm32/gpio.h
@@ -7,6 +7,8 @@
 #ifndef _GPIO_H_
 #define _GPIO_H_
 
+#define STM32_GPIOS_PER_BANK		16
+
 enum stm32_gpio_port {
 	STM32_GPIO_PORT_A = 0,
 	STM32_GPIO_PORT_B,
diff --git a/arch/arm/mach-stm32mp/include/mach/gpio.h b/arch/arm/mach-stm32mp/include/mach/gpio.h
index 46bef21..5ca76d2 100644
--- a/arch/arm/mach-stm32mp/include/mach/gpio.h
+++ b/arch/arm/mach-stm32mp/include/mach/gpio.h
@@ -8,6 +8,8 @@
 #define _STM32_GPIO_H_
 #include <asm/gpio.h>
 
+#define STM32_GPIOS_PER_BANK		16
+
 enum stm32_gpio_port {
 	STM32_GPIO_PORT_A = 0,
 	STM32_GPIO_PORT_B,
diff --git a/drivers/gpio/stm32f7_gpio.c b/drivers/gpio/stm32f7_gpio.c
index 55553c9..34cdafa 100644
--- a/drivers/gpio/stm32f7_gpio.c
+++ b/drivers/gpio/stm32f7_gpio.c
@@ -15,7 +15,6 @@
 #include <linux/errno.h>
 #include <linux/io.h>
 
-#define STM32_GPIOS_PER_BANK		16
 #define MODE_BITS(gpio_pin)		(gpio_pin * 2)
 #define MODE_BITS_MASK			3
 #define BSRR_BIT(gpio_pin, value)	BIT(gpio_pin + (value ? 0 : 16))