hbtp-input : fix L13A electric leakage issue

Currently TP power regulator might be voted twice in some
cases which will cause regulator not turned off in suspend
mode. So add condition checking to prevent this.

Signed-off-by: Xin Hua Lu <luxinhua@codeaurora.org>
Change-Id: Ic5cb163149a630700dbcb97ae39023c17cb0816d