plat/qemu: Enable SVE for SWD am: 48076c20b7

Original change: https://android-review.googlesource.com/c/trusty/external/trusted-firmware-a/+/3114668

Change-Id: I2d64fc0b0a7e2fdf0f11f59baa9b3adb656e850f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>