test(realm): add test for RSI_PLANE_REG_READ/WRITE command

test for RSI_PLANE_REG_READ/WRITE command

Signed-off-by: Shruti Gupta <shruti.gupta@arm.com>
Change-Id: I92e0aeef48c9b2abe26e5d3b2ea62669a22d4f8b
9 files changed