spi: atmel: Fix checkpatch issue

Fix the following checkpatch warning.

  WARNING: quoted string split across lines

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
1 file changed