ARM: dts: msm: Add RSC register to HW event for SDM855

Some hardware events need second level MUX selecting.
Add RSC registers to the list of registers supported
by HW event setreg interface.

Change-Id: If855be601fde52d3d1132ef3f8f58a834b1b1961
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>