dmaengine: dw-axi-dmac: cleanup comments

For spdx, /* */ for *.h, remove extra space

Replacements
configurarion to configuration
inerrupts to interrupts
chanels to channels

Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220309020056.1026106-1-trix@redhat.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>