Input: xpad - avoid using __set_bit() for capabilities

[ Upstream commit a01308031c2647ed5f1c845104b73a8820a958a9 ]

input_set_capability() and input_set_abs_param() will do it for you.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>