Revert "ARM: dts: msm: Add RPMH CPR register range in GPU DTSI"

This reverts commit d308f564.
SW workaround in GFX driver is not needed after a better system
workaround is already in place.

CRs-Fixed: 2085877
Change-Id: I9ced3fd89d4ca01db01a7d5bb0d7a198564c3c74
Signed-off-by: George Shen <sqiao@codeaurora.org>