usb: typec: hd3ss3220_irq() can be static

Fixes: 1c48c759 ("usb: typec: driver for TI HD3SS3220 USB Type-C DRP port controller")
Signed-off-by: kbuild test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20191005215727.qfypxoswkiyu45ak@332d0cec05f4


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>