Build: Disable unsupported platforms in pp_test

This is a temporary patch to disable platforms that are not supported by
split build yet. These configs will be re-enabled once the platform
porting is done.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ia0f3e3964d67a0c11d165cc03d186a0690075b52
1 file changed