clk: qcom: Update the FMAX corners for clocks on SDM845 and SDM670

Update the fixup functions for SDM845 v2 and SDM670 to reflect
changes in the frequency plan.

Change-Id: Ie20d75197444ad90931f6410d278b591bece5ba4
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>