ARM: ux500: select REGULATOR

MACH_MOP500 selects REGULATOR_FIXED_VOLTAGE but not REGULATOR. This
patch makes it select the latter too.

Seen as:
    warning: (MACH_DOVE_DT && ARCH_KIRKWOOD_DT && MACH_AMS_DELTA &&
    MACH_MOP500 && TPS6105X) selects REGULATOR_FIXED_VOLTAGE which has
    unmet direct dependencies (REGULATOR)

Signed-off-by: Emilio López <emilio@elopez.com.ar>
fixup! net: Add EMAC ethernet driver found on Allwinner A10 SoC's
fixup! ARM: cubieboard: Enable ethernet (EMAC) support in dts
PLEASE DO NOT WORK ON TOP OF THIS BRANCH

a) because it will be frequently rebased
b) because it contains experimental, likely to change code
c) because it may generate unmergeable patches

Please use a rc tag from Torvalds or the respective maintainer tree as
your working branch. Thanks

Signed-off-by: Emilio López <emilio@elopez.com.ar>