input: touchscreen: synaptics_tcm: Remove shutdown operation

Currently, in syna_tcm shutdown syna_tcm remove operations
are performed. If shutdown is called when resume is in
progress, it can lead to using of already freed memory in
resume function.

Change-Id: I8c226d0866e68ce6a6d22346a0678acc0cc09e46
Signed-off-by: Ritesh Kumar <riteshk@codeaurora.org>