spi/davinci: Fix DMA API usage in davinci
spi/davinci: Fix DMA API usage in davinci

The driver uses NULL for dma_unmap_single instead of
the struct device that the API expects.

Signed-off-by: Shubhrajyoti D <7810ac0734ae29fb564af1d0a4b317a3aa466f25@ti.com>
Tested-by: Akshay Shankarmurthy <4b133704722bd07a14a3321c96c0ac7802a45784@ti.com>
Signed-off-by: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@secretlab.ca>

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