dmaengine: sirf: add PM entries for sleep and runtime
dmaengine: sirf: add PM entries for sleep and runtime

this patch adds PM ops entries in sirf-dma drivers, so that this
driver can support suspend/resume, hibernation and runtime PM.

while suspending, sirf-dma will lose all registers, so we save
them at suspend and restore in resume for active channels.

Signed-off-by: Barry Song <a856445693a373abed3e477bd705f7011cbd8a1d@csr.com>
Signed-off-by: Rongjun Ying <de8e7bb55f7bd7910f319d220a2276cc0dad9324@csr.com>
Signed-off-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs