Build: Reintroduce PS_TEST_NV_COUNTERS variable

Restores the PS_TEST_NV_COUNTERS build variable, used to enable the
test NV counters implementation, and the Protected Storage rollback
tests.

Change-Id: Ibb1ddbb456118d647409fad1770705990089ba1c
Signed-off-by: Jamie Fox <jamie.fox@arm.com>
1 file changed