feat(aarch64): add DBGPRCR_EL1 register accessors

This is a small change adding accessor functions for the Debug Power
Control register (DBGPRCR_EL1) to the common architectural helpers.

Change-Id: I72261fbf0395d900347b46af320093ed946aa73d
Signed-off-by: Chris Kay <chris.kay@arm.com>
4 files changed