platform: msm8974: Clock support for hs400

Add support for gpll4, sdc_ff & sdc_sleep clocks.
Also update sdc1 frquency table to run sdc1 core clock
at 400 MHZ

CRs-Fixed: 501718
Change-Id: I7c08a4f65c7850f23c0184342875a4bf035e6d5e
5 files changed