dma: of-dma.c: fix memory leakage
dma: of-dma.c: fix memory leakage

The memory allocated to ofdma might be a leakage when error occurs.

Signed-off-by: Cong Ding <8001b54ad539330acc19ca3e17ac1f04f07b36a6@gmail.com>
Signed-off-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@intel.com>

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