msm: input: touchscreen: Rebase the STM FTS driver

This commit is a squash of below fixes from the branch msm-4.14.
And fix warnings for code style check.

b32c2b2d input: touchscreen: st: Disable PRESSURE event report
ebff0655 input: touchscreen: st: update firmware without userhelper
66b2a799 input: touchscreen: st: turn off regulator during suspend
12ccf96e input: touchscreen: st: add pinctrl config during suspend/resume
7f345b84 Merge "input: touchscreen: Assign the TP from UEFI or DTSI"
138c7b31 input: touchscreen: st: add fix in driver to support VMAP_STACK
22c3dd53 input: touchscreen: st: release Int/Reset resource
52a3b681 input: touchscreen: st: add XY axis flip property support
1a13eafb input: touchscreen: st: fix code sytle error
3da45a36 Merge "input: touchscreen: st: enable touch firmware upgrade"
b5d1634d input: touchscreen: st: enable touch firmware upgrade
3dbed1b5 input: touchscreen: st: remove useless firmware file
b8f54403 Merge "input: touchscreen: multi-touch for ST touch"
b625338a input: touchscreen: multi-touch for ST touch
26348a70 input: touchscreen: clean kernel log for ST touch
b133ccf7 input: touchscreen: Disable fts_fw_update_auto
f5872e1b input: touchscreen: Update ST touch driver
41ab1282 input: touchpanel: fix wastes of time when resume and probe...
4426865e input: touchscreen: fix issues related to variable initialization
e8a48fda input: touchpanel: Add ST Touchscreen version 4.1.0 driver

The above gerrits are in the complete list for this driver IC.

Change-Id: I1e50d2d5bcad94c5bf38de4921314166c73ebb8c
Signed-off-by: Fei Mao <feim1@codeaurora.org>