ieee1394: speed up of dma_region_sync_for_cpu
ieee1394: speed up of dma_region_sync_for_cpu

when attempting to find the 'last' part of the dma region continue the
search from where we left off, instead of starting the search over.

Signed-off-by: Jim Westfall <09bc2be9ee0bb66d3707c85d6acc5be82eb72b1c@surrealistic.net>
Signed-off-by: Ben Collins <313d575bc822fefc4b8f5cef37aa7dabeb604115@ubuntu.com>

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