feat(spm): change UART0-1 to NS device region

To enable device memory sharing test make memory region for UART0
and 1 a NS device region so that it can be shared by tf-a-tests
to the cactus SP.

Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
Change-Id: Iadfe02a65f5d4a8b60296f07c4943dd31f201453
1 file changed