configs: clearfog: enable SPL_DM_GPIO to fix boot from SD

SPL needs DM GPIO to read the SD card-detect signal. This complements
the fix in commit 70bae02f71d4 ("arm: mvebu: clearfog: fix boot from SD
card").

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
1 file changed