SPL: mmc: Make spl_mmc_load_image available

Make the spl_mmc_load_image() available globally, so it can be
invoked directly by SPL on extremely space-constrained systems.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Jaehoon Chung <jh80.chung@samsung.com>

common/spl/spl_mmc.c

@@ -272,8 +272,8 @@ static int spl_mmc_do_fs_boot(struct spl_image_info *spl_image, struct mmc *mmc)
 }
 #endif
 
-static int spl_mmc_load_image(struct spl_image_info *spl_image,
-			      struct spl_boot_device *bootdev)
+int spl_mmc_load_image(struct spl_image_info *spl_image,
+		       struct spl_boot_device *bootdev)
 {
 	struct mmc *mmc = NULL;
 	u32 boot_mode;

include/spl.h

@@ -234,4 +234,7 @@ bool spl_was_boot_source(void);
  */
 int spl_dfu_cmd(int usbctrl, char *dfu_alt_info, char *interface, char *devstr);
 
+int spl_mmc_load_image(struct spl_image_info *spl_image,
+		       struct spl_boot_device *bootdev);
+
 #endif