Check the status bits in the r/w command response for any errors.
If error bits are set, then we won't have seen any data transferred,
so it's pointless doing any further checking.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Tested-by: NPawel Moll <pawel.moll@arm.com>
Signed-off-by: NChris Ball <cjb@laptop.org>