spl: mmc: Unify non/driver model spl_mmc_find_device()

It is risky to have two different functions with much the same code. Future
authors may update one but not the other. It is hard to see which parts are
the same and which are different.

Unify the functions and drop the differences that are not really needed.

Note that one puts() becomes printf() as Tom mentioned that this does not
affect image size:

https://patchwork.ozlabs.org/patch/537276/

Note: It would be better to have an empty printf() and avoid the #ifdef for
CONFIG_SPL_LIBCOMMON_SUPPORT.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Michal Simek <michal.simek@xilinx.com>

common/spl/spl_mmc.c

@@ -78,10 +78,11 @@ int spl_mmc_get_device_index(u32 boot_device)
 	return -ENODEV;
 }
 
-#ifdef CONFIG_DM_MMC
 static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
 {
+#ifdef CONFIG_DM_MMC
 	struct udevice *dev;
+#endif
 	int err, mmc_dev;
 
 	mmc_dev = spl_mmc_get_device_index(boot_device);
@@ -96,47 +97,23 @@ static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
 		return err;
 	}
 
+#ifdef CONFIG_DM_MMC
 	err = uclass_get_device(UCLASS_MMC, mmc_dev, &dev);
-	if (err) {
-#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
-		printf("spl: could not find mmc device. error: %d\n", err);
-#endif
-		return err;
-	}
-
-	*mmcp = NULL;
-	*mmcp = mmc_get_mmc_dev(dev);
-	return *mmcp != NULL ? 0 : -ENODEV;
-}
+	if (!err)
+		*mmcp = mmc_get_mmc_dev(dev);
 #else
-static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
-{
-	int err, mmc_dev;
-
-	mmc_dev = spl_mmc_get_device_index(boot_device);
-	if (mmc_dev < 0)
-		return mmc_dev;
-
-	err = mmc_initialize(gd->bd);
+	*mmcp = find_mmc_device(mmc_dev);
+	err = *mmcp ? 0 : -ENODEV;
+#endif
 	if (err) {
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
-		printf("spl: could not initialize mmc. error: %d\n", err);
+		printf("spl: could not find mmc device. error: %d\n", err);
 #endif
 		return err;
 	}
 
-	/* We register only one device. So, the dev id is always 0 */
-	*mmcp = find_mmc_device(mmc_dev);
-	if (!*mmcp) {
-#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
-		puts("spl: mmc device not found\n");
-#endif
-		return -ENODEV;
-	}
-
 	return 0;
 }
-#endif
 
 #ifdef CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION
 static int mmc_load_image_raw_partition(struct mmc *mmc, int partition)