refactor(neoverse-rd): refactor mmap macro for CSS device memory region

There are two macros that define CSS device memory map range and
attributes - one for local chip and the other for remote chip. Refactor
these two macros into a single macro that uses the chip ID to identify
the local or the remote chip. While at it, rename the macro that defines
the memory map range and attributes for the remote shared RAM region.

Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
Change-Id: Ieddd5c81f6261490dbacb97160858903e56d327a
3 files changed