Platform/SbsaQemu: add NVME support

It is weird that I can have NVME, can install OS on it but cannot boot
from it.

This change adds NVME support so it can be mapped and used.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>