fix: pass SMCCCv1.3 SVE hint to internal flags

This change fixes the initial support for SMCCCv1.3 SVE hint bit [1].
In the aarch64 smc handler, the FID[16] bit is improperly extracted
and results in the corresponding flags bit to be always set.
Fix by doing the proper masking and set into the flags register.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/17511

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I62b8e211d48a50f28e184ff27cd718f51d8d56bf
1 file changed