A bounce buffer of 512K isn't needed as the max request size is
511 * 512 byte.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NKevin Hilman <khilman@baylibre.com>
Tested-by: NKevin Hilman <khilman@baylibre.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>