mb/google/asurada: Implement enable_regulator and regulator_is_enabled

SD Card driver needs to access two regulators - MT6360_LDO5 and
MT6360_LDO3. These two regulators are disabled by default.

Two APIs are implemented:
- mainboard_enable_regulator: Configure the regulator as enabled/disabled.
- mainboard_regulator_is_enabled: Query if the regulator is enabled.

BUG=b:168863056,b:147789962
BRANCH=none
TEST=emerge-asurada coreboot

Change-Id: I391f908fcb33ffdcccc53063644482eabc863ac4
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46687
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions