mb/google/brya: Remove `mb_gpio_lock_config()` override function
This patch removes `lockable_brya_gpios` lists and
`mb_gpio_lock_config` override function from brya baseboard directory as
the variant GPIO pad configuration table is now capable of locking GPIO
PADs.
BUG=b:
208827718
TEST=Able to built and boot brya.
Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ifc7354f2ae3817459b5494d572c603eba48ec66a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61503
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>