gpio: stm32: Rename stm32f7_gpio to stm32_gpio

As this driver is used on stm32f4/f7/h7 and stm32mp1
SoCs, rename it with a more generic name.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e36a8ab..be07333 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -255,13 +255,13 @@
 	help
 	  Say yes here to support Microchip PIC32 GPIOs.
 
-config STM32F7_GPIO
+config STM32_GPIO
 	bool "ST STM32 GPIO driver"
 	depends on DM_GPIO && (STM32 || ARCH_STM32MP)
 	default y
 	help
 	  Device model driver support for STM32 GPIO controller. It should be
-	  usable on many stm32 families like stm32f4 & stm32H7.
+	  usable on many stm32 families like stm32f4/f7/h7 and stm32mp1.
 	  Tested on STM32F7.
 
 config MVEBU_GPIO