CI: Enable 'memtag' in TFTF fvp-cpu-extensions configuration

This patch enables 'memtag' Arm Architecture modifier
by adding 'ARM_ARCH_FEATURE=memtag' and 'ARM_ARCH_MINOR=5'
to TFTF fvp-cpu-extensions configuration to allow compiler
to generate MTE instructions.

Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Change-Id: I912eb851911ced30a95d2441c0b9f23fff543b49
1 file changed