msm: kgsl: Try fault tolerance even if there is no active context

No active context means that GPU could have failed when executing
commands that set an active context. In this case there are no bad
commands. This sort of hang can mostly be attributed to power
fluctuations or memory barriers which in all likelyhood can pass
after a reset. So treat no active context as a recoverable hang
scenario as well.

Change-Id: I0481a480bdb895f67daa2ed32df49eb1afe29029
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
Signed-off-by: Ananta Kishore K <akollipa@codeaurora.org>