fix: add sysreg define for ID_AA64MMFR3_EL1

The patch 7c78f7b4a removed the definition for ID_AA64MMFR3_EL1 sysreg.
This define is needed for older GCC (like GCC 11) to compile TFTF
successfully. This patch restores the define.

Change-Id: I18f8e00830c8e72807b6f1613e9d9864f12669ba
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
1 file changed