test(SMCCC): add test for SMCCC_ARCH_WORKAROUND_3

This adds SMCCC tests for SMCCC_ARCH_WORKAROUND_3 applicable for
Cortex-A57/72/73/75 introduced as part of CVE-2022-23960 mitigation.

Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: If56bb0a69deda9032e050bdd2de98c8c4a5becbb
4 files changed