pwm: img: Call pm_runtime_put() in pm_runtime_get_sync() failed case

[ Upstream commit ca162ce98110b98e7d97b7157328d34dcfdd40a9 ]

Even in failed case of pm_runtime_get_sync(), the usage_count is
incremented. In order to keep the usage_count with correct value call
appropriate pm_runtime_put().

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>