input: touchscreen: Code clean-up for Goodix driver

Fix errors and warnings found by checkpatch script in
goodix_tool.c and gt9xx_update.c.
Correct debug messages in goodix_update.c
Remove magic numbers for read-write flags with macros
in goodix_tool.c

Change-Id: I3a00fb46106f859128f0fa9b8c99b5d6ba24bc7b
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>