Fix EC_IN_RW config for Rex. Dauntless on Rex does not have an EC_IN_RW GPIO pin.
Port of commit 7f339c6050 ("mb/google/corsola: Correct EC-is-trusted logic")
BUG=b:243950850
TEST=Built and booted to Google Rex.
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Change-Id: I97e5c752b4f36c9221137903f755837880f6b1c4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67208
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
4060860942