ARM: omap2plus_defconfig: Enable LP872x regulator support

The LP872x regulator is used in the LG Optimus Black codename sniper to supply
the external mmc card.
Signed-off-by: NPaul Kocialkowski <contact@paulk.fr>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -277,6 +277,7 @@ CONFIG_MFD_TPS65218=y
 CONFIG_MFD_TPS65910=y
 CONFIG_MFD_TI_AM335X_TSCADC=m
 CONFIG_TWL6040_CORE=y
+CONFIG_REGULATOR_LP872X=y
 CONFIG_REGULATOR_PALMAS=y
 CONFIG_REGULATOR_PBIAS=y
 CONFIG_REGULATOR_TI_ABB=y