input: touchpanel: Goodix GT915 driver cleanup

Code clean up that makes the driver more like a linux driver.
Add some error recovery to make sure driver will not crash when
error is occurs. Also have cleared the checkpatch errors on 3.18

  This patch is propagated from 3.4 kernel
    commit: c2fcdcda743f881eacccd0ebfe2ab206bf7a6b75
    input: touchpanel: Goodix GT915 driver cleanup

Change-Id: I3af425f5f0251ec576168f72a2059f85c3be4358
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>