The function arch_sync_dma_for_cpu_all() was used but was
missing a prototype declaration.
Signed-off-by: NJim Quinlan <jim2101024@gmail.com>
Reported-by: Nkernel test robot <lkp@intel.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>