config: Support physical address in device region

Support `physical-address` property in the device region of the SP
manifest. The value of the property is passed through by the SPMC
without any change.

For now the support is only available for FFA boot info version 1.1.

The change was tested successfully with OP-TEE SPMC.

Signed-off-by: Michael Zhao <michael.zhao2@arm.com>
Change-Id: I6a9db39a1d2ffdd331a6d7a4455fc99d99a6fb5a
2 files changed