All versions of Cortex-A53 cores are affected by the speculative
AT instruction erratum, as mentioned in the Cortex-A53 Revision r0
SDEN v21 documentation.
Enabled ARM64_WORKAROUND_AT_SPECULATE for all versions of Cortex-A53
cores, to avoid corrupting the TLB if performing a speculative AT
instruction during a guest context switch.
Signed-off-by: Andrei Cherechesu <andrei.cherechesu@nxp.com>
Acked-by: Julien Grall <jgrall@amazon.com>