ARM: imx_v6_v7_defconfig: Enable some drivers used on the cpuimx35.

The eukrea cpuimx35 has a pcf8563 RTC and a LCD gpio regulator.

We enable the respective drivers in order to be able to use theses
  features with this configuration.

Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -167,6 +167,7 @@ CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_ANATOP=y
 CONFIG_REGULATOR_DA9052=y
+CONFIG_REGULATOR_GPIO=y
 CONFIG_REGULATOR_MC13783=y
 CONFIG_REGULATOR_MC13892=y
 CONFIG_REGULATOR_PFUZE100=y
@@ -228,6 +229,7 @@ CONFIG_LEDS_TRIGGER_BACKLIGHT=y
 CONFIG_LEDS_TRIGGER_GPIO=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_INTF_DEV_UIE_EMUL=y
+CONFIG_RTC_DRV_PCF8563=y
 CONFIG_RTC_DRV_MC13XXX=y
 CONFIG_RTC_DRV_MXC=y
 CONFIG_RTC_DRV_SNVS=y