- * Both mmc0 and mmc2 are bootable, figure out where we're booting
- * from. Try mmc0 first, just like the brom does.
+ * On systems with an emmc (mmc2), figure out if we are booting from
+ * the emmc and if we are make it "mmc dev 0" so that boot.scr, etc.
+ * are searched there first. Note we only do this for u-boot proper,
+ * not for the SPL, see spl_boot_device().