msm: idle-v7: do not clean and invalidate after warm boot

The boot chain will already have invalidated any caches which
contain invalid data due to powering the caches on, so it is not
necessary to do that operation here. This call is also incorrect
because it is being done after caches are already enabled.

Change-Id: I1402f08712f45cb4598bcbc470b89637c1952056
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>