input: touchscreen: clean kernel log for ST touch

To fix an issue which ST touch only works after resume device, make touch
senses on at end of touch driver's probe process.
To remove some kernel console output for debug, replace with "logError(0".
Only keep essential log to show touch driver is ready.

Change-Id: I52e04c6784d741374b8af3fcee434c34f97ed2ab
Signed-off-by: Fei Mao <feim1@codeaurora.org>