msm: ipa: keep proxy clock on if uC loading fails

Remove clk unvote if uC loading fails so device does not enter power
collapse as uC is needed to restore the registers brought down by
power collapse.

Change-Id: I569b3138b89191cbdb5a01a2a09090e514f65cc2
Signed-off-by: Michael Adisumarta <madisuma@codeaurora.org>