mb/google/geralt: Add support for VM18 in regulator.c
Add regulator VM18 support to supply power for BOE_TV110C9M_LL0.
BUG=b:
244208960
TEST=test firmware display pass for BOE_TV110C9M_LL0 on Geralt.
Change-Id: I13bafbe10a18a18e253575fd107c9b415f28ef01
Signed-off-by: Sen Chu <sen.chu@mediatek.corp-partner.google.com>
Signed-off-by: Liju-Clr Chen <liju-clr.chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72748
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>