msm/sde: prevent double register of input handler

During Dynamic mode switch case, input_register_handler
is called even after it is registered leading to
list double add warnings and panic.

Change-Id: I312112deb08c998af516252f2117bc629eb13b37
Signed-off-by: Shubhashree Dhar <dhar@codeaurora.org>
1 file changed