mfd: Delete ab3550 driver

The AB3550 never passed the prototype stage. Instead it was used
as a precursor to AB5500 for testing basic building blocks used
in that chip, since they had large similarities. Since AB3550 will
not see the light of day in product form and since the prototypes
are no longer used, let's delete the driver and any references to
it.

Cc: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -616,20 +616,6 @@ config AB8500_GPADC
 	help
 	  AB8500 GPADC driver used to convert Acc and battery/ac/usb voltage
 
-config AB3550_CORE
-        bool "ST-Ericsson AB3550 Mixed Signal Circuit core functions"
-	select MFD_CORE
-	depends on I2C=y && GENERIC_HARDIRQS && ABX500_CORE
-	help
-	  Select this to enable the AB3550 Mixed Signal IC core
-	  functionality. This connects to a AB3550 on the I2C bus
-	  and expose a number of symbols needed for dependent devices
-	  to read and write registers and subscribe to events from
-	  this multi-functional IC. This is needed to use other features
-	  of the AB3550 such as battery-backed RTC, charging control,
-	  LEDs, vibrator, system power and temperature, power management
-	  and ALSA sound.
-
 config MFD_DB8500_PRCMU
 	bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
 	depends on UX500_SOC_DB8500

drivers/mfd/Makefile

@@ -79,7 +79,6 @@ obj-$(CONFIG_PCF50633_GPIO)	+= pcf50633-gpio.o
 obj-$(CONFIG_ABX500_CORE)	+= abx500-core.o
 obj-$(CONFIG_AB3100_CORE)	+= ab3100-core.o
 obj-$(CONFIG_AB3100_OTP)	+= ab3100-otp.o
-obj-$(CONFIG_AB3550_CORE)	+= ab3550-core.o
 obj-$(CONFIG_AB5500_CORE)	+= ab5500-core.o
 obj-$(CONFIG_AB5500_DEBUG)	+= ab5500-debugfs.o
 obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-sysctrl.o