Remove invalid config in per-patch job

Config MUSCA_B1_ARMCLANG_PSA_3_REG_Debug_BL2_NS would
come into code size issue. It has been disabled in CI.
Remove it from "valid" list in pp_test.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I28349413da11a8c72940ff13dd2ad34edaac3b72
1 file changed