mfd: pcf50633: Remove remaining PCF50633 support

Remove the remaining parts of the 50633, the core, headers and glue.

The pcf50633 was used as part of the OpenMoko devices but
the support for its main chip was recently removed in:
commit 61b7f89 ("ARM: s3c: remove all s3c24xx support")

See https://lore.kernel.org/all/Z8z236h4B5A6Ki3D@gallifrey/

Remove it.

Signed-off-by: "Dr. David Alan Gilbert" <linux@treblig.org>
Link: https://lore.kernel.org/r/20250311014959.743322-10-linux@treblig.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: Dr. David Alan Gilbert

arch/mips/configs/ip27_defconfig

@@ -255,7 +255,6 @@ CONFIG_I2C_TAOS_EVM=m
 CONFIG_I2C_STUB=m
 # CONFIG_HWMON is not set
 CONFIG_THERMAL=y
-CONFIG_MFD_PCF50633=m
 # CONFIG_VGA_ARB is not set
 CONFIG_LEDS_LP3944=m
 CONFIG_LEDS_PCA955X=m

drivers/mfd/Kconfig

@@ -1132,16 +1132,6 @@ config MFD_RETU
 	  Retu and Tahvo are a multi-function devices found on Nokia
 	  Internet Tablets (770, N800 and N810).
 
-config MFD_PCF50633
-	tristate "NXP PCF50633"
-	depends on I2C
-	select REGMAP_I2C
-	help
-	  Say yes here if you have NXP PCF50633 chip on your board.
-	  This core driver provides register access and IRQ handling
-	  facilities, and registers devices for the various functions
-	  so that function-specific drivers can bind to them.
-
 config MFD_PM8XXX
 	tristate "Qualcomm PM8xxx PMIC chips driver"
 	depends on ARM || HEXAGON || COMPILE_TEST

drivers/mfd/Makefile

@@ -183,8 +183,6 @@ obj-$(CONFIG_MFD_MT6370)	+= mt6370.o
 mt6397-objs			:= mt6397-core.o mt6397-irq.o mt6358-irq.o
 obj-$(CONFIG_MFD_MT6397)	+= mt6397.o
 
-pcf50633-objs			:= pcf50633-core.o
-obj-$(CONFIG_MFD_PCF50633)	+= pcf50633.o
 obj-$(CONFIG_RZ_MTU3)		+= rz-mtu3.o
 obj-$(CONFIG_ABX500_CORE)	+= abx500-core.o
 obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o