gpio: gpio-adp5588: drop the driver

With commit 9d2b2e83 ("Input: adp5588-keys - support gpi key events as
'gpio keys'") the irchip functionality is directly supported in the input
driver as the main goal of these pins is to be used as gpio keys. Hence,
this driver can be removed.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220829131553.690063-3-nuno.sa@analog.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MAINTAINERS

@@ -556,7 +556,6 @@ M:	Michael Hennerich <michael.hennerich@analog.com>
 S:	Supported
 W:	http://wiki.analog.com/ADP5588
 W:	https://ez.analog.com/linux-software-drivers
-F:	drivers/gpio/gpio-adp5588.c
 F:	drivers/input/keyboard/adp5588-keys.c
 
 ADP8860 BACKLIGHT DRIVER (ADP8860/ADP8861/ADP8863)

drivers/gpio/Kconfig

@@ -985,20 +985,6 @@ endmenu
 menu "I2C GPIO expanders"
 	depends on I2C
 
-config GPIO_ADP5588
-	tristate "ADP5588 I2C GPIO expander"
-	help
-	  This option enables support for 18 GPIOs found
-	  on Analog Devices ADP5588 GPIO Expanders.
-
-config GPIO_ADP5588_IRQ
-	bool "Interrupt controller support for ADP5588"
-	depends on GPIO_ADP5588=y
-	select GPIOLIB_IRQCHIP
-	help
-	  Say yes here to enable the adp5588 to be used as an interrupt
-	  controller. It requires the driver to be built in the kernel.
-
 config GPIO_ADNP
 	tristate "Avionic Design N-bit GPIO expander"
 	depends on OF_GPIO

drivers/gpio/Makefile

@@ -25,7 +25,6 @@ obj-$(CONFIG_GPIO_74X164)		+= gpio-74x164.o
 obj-$(CONFIG_GPIO_74XX_MMIO)		+= gpio-74xx-mmio.o
 obj-$(CONFIG_GPIO_ADNP)			+= gpio-adnp.o
 obj-$(CONFIG_GPIO_ADP5520)		+= gpio-adp5520.o
-obj-$(CONFIG_GPIO_ADP5588)		+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AGGREGATOR)		+= gpio-aggregator.o
 obj-$(CONFIG_GPIO_ALTERA_A10SR)		+= gpio-altera-a10sr.o
 obj-$(CONFIG_GPIO_ALTERA)  		+= gpio-altera.o