Build: Enable RAM_FS in all configs on MUSCA_B1

This is a workaround patch to avoid touching the broken flash
on MUSCA_B1 board in LAVA, which keeps blocking CI nightly job.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ia077d728bbd53522be81e5449e8457b4dbf22825
1 file changed