ARM: omap2plus_defconfig: Enable REGULATOR_GPIO

GPIO regulator is used on dra71-evm platform to control MMCSD IO
voltage
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -271,6 +271,7 @@ CONFIG_MFD_TPS65217=y
 CONFIG_MFD_TPS65218=y
 CONFIG_MFD_TPS65910=y
 CONFIG_TWL6040_CORE=y
+CONFIG_REGULATOR_GPIO=y
 CONFIG_REGULATOR_LP872X=y
 CONFIG_REGULATOR_PALMAS=y
 CONFIG_REGULATOR_PBIAS=y