msm: vidc: Scale venus ddr and vmem bus bandwidth for TURBO mode

This includes change to scale venus ddr and vmem bus bandwidth
to maximum if client sets turbo mode.
It also includes change to fix deadlock when lower level code
attempts to call g_ctrl() within s_ctrl().

Change-Id: Icf7a058f76656744cb6c504d93ee724e32224a94
Signed-off-by: Sowmya Pandiri <spandiri@codeaurora.org>