mfd: arizona: Remove duplicate select of MFD_CORE

MFD_ARIZONA_I2C and MFD_ARIZONA_SPI both select MFD_ARIZONA and all
three of those select MFD_CORE, this makes the selects of MFD_CORE in
MFD_ARIZONA_I2C and MFD_ARIZONA_SPI redundant, so we remove them.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/Kconfig

@@ -1407,7 +1407,6 @@ config MFD_ARIZONA
 config MFD_ARIZONA_I2C
 	tristate "Cirrus Logic/Wolfson Microelectronics Arizona platform with I2C"
 	select MFD_ARIZONA
-	select MFD_CORE
 	select REGMAP_I2C
 	depends on I2C
 	help
@@ -1417,7 +1416,6 @@ config MFD_ARIZONA_I2C
 config MFD_ARIZONA_SPI
 	tristate "Cirrus Logic/Wolfson Microelectronics Arizona platform with SPI"
 	select MFD_ARIZONA
-	select MFD_CORE
 	select REGMAP_SPI
 	depends on SPI_MASTER
 	help