Didn't take more care about non-pfuze board, and there is two place in BSP will
call "mx6_cpu_regulator_init". It means regulator_get will be called twice on
every vddcore/vddsoc regulator. Then one value need set twice ,because from
regulator core view, there is two regulators share the same regulator. The non-
validate one will return error and print "COULD NOT SET GP VOLTAGE!!!!." on
Sabreauto board. The same as Sabrelite and ARM2 board.

Meanwhile, Sabreauto need be configured LDO bypass default.
Signed-off-by: Robin Gong <b38343@freescale.com>