clk: qcom: Remove GPU_CC_GX_CXO_CLK control for SDM845

GPU_CC_GX_CX0_CLK default is ON in HW. The clock will be on
whenever GX GDSC is enabled. No need to be controlled by the
clock driver.

CRs-Fixed: 2091973
Change-Id: Ief1e5d5c8dc6017587ed63f410e9785a393d3e13
Signed-off-by: Vicky Wallace <vwallace@codeaurora.org>