test(spm): check rxtx unmap at NS physical instance

Validate that a call to FFA_RXTX_UNMAP from the NS
physical FF-A instance, can't result in SPMC unampping
buffers belonging to an SP.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Iebb51a1bb8db96c6ea9e22235e0d884f7b62f1c7
2 files changed