msm: pil-gss: Remove PLL5 programming

The bootloaders are properly configuring this PLL now so we don't
need to program it. This also fixes a CXO shutdown issue where
CXO is always on because the PLL5 configuration code was leaving
the XO enabled. The code was correct in assuming that the RPM
hadn't setup the PLL so it was fine before. Luckily it's no
longer necessary though so we can remove it.

Change-Id: Ia2077d08571eda0fa71036f23887c2732a429e62
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>