fix(cactus_tests/ffa): dynamically calculate array size

This patch uses the ARRAY_SIZE() macro to calculate the number
of elements in the 'ffa_expected_partition_info' array instead
of hard-coding to '4'.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: Ia0f19785b99e4b645ffa2ca61705f2329640a130
1 file changed