ARM: dts: msm: add rpm_master_stats support

Add rpm_master_stats support in msm8974 pro dtsi file
to print the status of each master in the system.

CRs-Fixed: 586130
Change-Id: I32b795569e27f7cb4bc6b94ccfbb8f2c2a1fd188
Signed-off-by: Anil kumar mamidala <amami@codeaurora.org>