input: touchscreen: Use proper conventional functions for debug

Replace non-standard debug function with the conventional
functions in Goodix driver. And remove unnecessary debug
function used in Goodix driver.

Change-Id: Ia89d225333c1309710aab67b9c406784567e3050
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
Signed-off-by: Sudhakar Manapati <smanap@codeaurora.org>