msm: acpuclock-7627: Select dynamic reprogramming based on pll_config

Instead of fixing the selection of dynamic reprogramming method
based on the PLL4 rate, select it based on the pll_config pointer
supplied in the frequency table. This way the selection won't be
based on fixed frequency like 1.4GHz.

Change-Id: I3fe1982608980ece1c522205ec91162b635ea0aa
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>