intel_mid_i2s: fix runtime pm

intel_mid_i2s: fix runtime pm

BZ: 15772

PCI device drivers need this change due to runtime pm init
scheme change in Linux 3.0

Change-Id: I8051637114ebadcb236efd25a1a5029e66aacff4
Signed-off-by: Fei Yang <fei.yang@intel.com>
Reviewed-on: http://android.intel.com:8080/25641
Reviewed-by: Le Gall, Louis <louis.le.gall@intel.com>
Reviewed-by: Pichon, SylvainX <sylvainx.pichon@intel.com>
Reviewed-by: Germond, Cyril <cyril.germond@intel.com>
Reviewed-by: Suet, NicolasX <nicolasx.suet@intel.com>
Reviewed-by: Barthes, FabienX <fabienx.barthes@intel.com>
Tested-by: Barthes, FabienX <fabienx.barthes@intel.com>
Reviewed-by: Centelles, Sylvain <sylvain.centelles@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>