staging: kpc2000: kpc_dma: fix spelling mistake "for for" -> "for"

There are a couple of duplicated "for" spelling mistakes in dev_err
error messages. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200818164654.381588-1-colin.king@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>