apexq: raise VFE clock rate

Based on d2 commits 7d85e50574ca1eabe3d8c09792175186f6f401f2 and
aec6d36f1db31233d5e203d4f7c5176959ed2b3f

Change-Id: I3ecaf2bb30de48ea1bc84239097ccdefd87d7c59