ARM: multi_v7_defconfig: Enable AM437x PMIC TPS65218

Enable PMIC for AM437x platforms such as AM437x-sk similar to commit
a186cf10 ("ARM: omap2plus_defconfig: enable TPS65218 configs").
This allows multi_v7_defconfig to boot up on AM437x-sk platform.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/configs/multi_v7_defconfig

@@ -438,6 +438,7 @@ CONFIG_MFD_STMPE=y
 CONFIG_MFD_PALMAS=y
 CONFIG_MFD_TPS65090=y
 CONFIG_MFD_TPS65217=y
+CONFIG_MFD_TPS65218=y
 CONFIG_MFD_TPS6586X=y
 CONFIG_MFD_TPS65910=y
 CONFIG_REGULATOR_AB8500=y
@@ -470,6 +471,7 @@ CONFIG_REGULATOR_TPS51632=y
 CONFIG_REGULATOR_TPS62360=y
 CONFIG_REGULATOR_TPS65090=y
 CONFIG_REGULATOR_TPS65217=y
+CONFIG_REGULATOR_TPS65218=y
 CONFIG_REGULATOR_TPS6586X=y
 CONFIG_REGULATOR_TPS65910=y
 CONFIG_REGULATOR_TWL4030=y