input: synaptics: Avoid kernel crash when voltages are unstable

2013.09.24
- Fixed kernel panic when voltages are unstable (error handling)

Signed-off-by: Alexandra Chin <alexandra.chin@tw.synaptics.com>
Change-Id: Ie1da0e4215ad7aeff2d5e1df1846e417609afb73
Git-commit: d19d8947f5c24d57fe5ce8b92510401a15b860ba
Git-repo: git://github.com/synaptics-touch/msm-3.4.git


[amaloche@codeaurora.org: Modified commit message for proper form]
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>