input: touchpanel: fix security issues in GT915 driver

There are multiple buffer overflow and input validation issues
in Goodix gt915 driver, fix these issues by adding data length
check and change file system node mode.

CRs-Fixed: 526101

This patch is propagated from msm-3.10 kernel
(commit: f53bcf29a6e7a66b3d935b8d562fa00829261f05
input: touchpanel: fix security issues in GT915 driver)

Change-Id: I5173fc1ca021fd45c939c7c8a4f460651330de5b
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>