fix(versal_net): Enable a78 errata workarounds

TF-A is reporting that erratum are missing to be enabled.

Enable the Following errata workaround to Cortex-A78 AE CPU for versal_net
ERRATA_A78_AE_1941500
ERRATA_A78_AE_1951502
ERRATA_A78_AE_2376748
ERRATA_A78_AE_2395408

For further information refer to
https://developer.arm.com/documentation/SDEN1707912/1300/



Signed-off-by: Akshay Belsare <Akshay.Belsare@amd.com>
Change-Id: Ib7fc16e035feab1dfbd88c1f8ce128b057eee86d