msm: kgsl: Make sure first boot sequence is complete during touch event

It's possible that a touch event may happen before the first kgsl
instance is opened, which triggers the first boot sequence. This sequence
must happen before touch event can trigger a power on sequence.

Change-Id: I21af7865f4b02408d4f00814b4af6c9b9e8f5545
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>