dmaengine/ste_dma40: add a separate queue for pending requests
dmaengine/ste_dma40: add a separate queue for pending requests

tx_submit will add descriptors to the pending queue. Issue pending
will then move the pending descriptors to the transfer queue.

Signed-off-by: Per Forlin <eef895a6d2c8ac90ff468c9f412501c535a132ff@linaro.org>
Signed-off-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas