test(rme): intermittently switch to Realm while NS doing SSVE ops

Interleave NS Streaming SVE operations with Realm SVE operations and
check whether Streaming SVE vectors are not affected.

This commit extends the existing SVE test case to work on both Normal
and Streaming SVE mode.

This testcase runs for SVE+SME config and for SME only config.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I70fe20f980866cbdd5dadf85804a9e5738227846
2 files changed