power: twl4030: Remove CONFIG_TWL4030_POWER from include/configs

With the addition of Kconfig now having CONFIG_TWL4030_POWER and
with that being the default when OMAP34XX is selected, this
is no longer needed in include/configs and can be removed from the
whitelist.

This has only been tested on logic PD DM3730 using ti_omap3_common.h

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>