input: touchscreen: Fix section mismatch

WARNING: drivers/built-in.o(.text+0x14194c): Section mismatch in
reference from the function msm_ts_enable() to the function
.devinit.text:msm_ts_hw_init()
The function msm_ts_enable() references
the function __devinit msm_ts_hw_init().
This is often because msm_ts_enable lacks a __devinit
annotation or the annotation of msm_ts_hw_init is wrong.

Change-Id: I960303c31c514e11e9723e1e10d2845e37143415
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>