input: misc: hbtp_input: fix memory corruption in list_del_entry

Fix memory corruption in the hbtp_input driver by adding
complete in the release routine to resolve the Kernel crash
in __list_del_entry corruption.

Signed-off-by: Vevek Venkatesan <vevekv@codeaurora.org>
Change-Id: I764923317f720137bfd4e7adfc6bf763a36911c3