mmc: core: Export regulator_* functions as GPL

The regulator API functions we're wrapping are exported as GPL, so our
wrappers for the same functions should be too.
Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/core/core.c

@@ -950,7 +950,7 @@ int mmc_regulator_get_ocrmask(struct regulator *supply)
 
 	return result;
 }
-EXPORT_SYMBOL(mmc_regulator_get_ocrmask);
+EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);
 
 /**
  * mmc_regulator_set_ocr - set regulator to match host->ios voltage
@@ -1020,7 +1020,7 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
 			"could not set regulator OCR (%d)\n", result);
 	return result;
 }
-EXPORT_SYMBOL(mmc_regulator_set_ocr);
+EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr);
 
 #endif /* CONFIG_REGULATOR */