fix(notifications): destroy VM's bitmap

The last test in the notifications test suite was not
cleaning up after itself. This change makes the test destroy
the bitmap for the receiver VM in the SPMC.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ia96b8d6e680dd0af99a2c767cd35efe38cf10011
1 file changed