plat: marvell: armada: a3k: Add checks that WTP, MV_DDR_PATH and CRYPTOPP_PATH are correctly defined

These variables must contain a path to a valid directory (not a file) which
really exists. Also WTP and MV_DDR_PATH must point to either a valid Marvell
release tarball or git repository.

Signed-off-by: Pali Rohár <pali@kernel.org>
Change-Id: I1ad80c41092cf3ea6a625426df62b7d9d6f37815
1 file changed