os/pm: fix 'unused variable'
os/pm: fix 'unused variable'

Change-Id: I8797b10fd1745b11a5ba5b7d41d5936a86c5b75a
Signed-off-by: Oleg Lyovin <9e7fd33cf90c7e429276114f54b1f8488150523e@partner.samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT