fs: Quieten down the filesystems more

When looking for a filesystem on a partition we should do so quietly. At
present if the filesystem is very small (e.g. 512 bytes) we get a host of
messages.

Update these to only show when debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/disk/part_efi.c b/disk/part_efi.c
index ad94504..26738a5 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -264,20 +264,19 @@
 
 	/* "part" argument must be at least 1 */
 	if (part < 1) {
-		printf("%s: Invalid Argument(s)\n", __func__);
-		return -1;
+		log_debug("Invalid Argument(s)\n");
+		return -EINVAL;
 	}
 
 	/* This function validates AND fills in the GPT header and PTE */
 	if (find_valid_gpt(dev_desc, gpt_head, &gpt_pte) != 1)
-		return -1;
+		return -EINVAL;
 
 	if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
 	    !is_pte_valid(&gpt_pte[part - 1])) {
-		debug("%s: *** ERROR: Invalid partition number %d ***\n",
-			__func__, part);
+		log_debug("*** ERROR: Invalid partition number %d ***\n", part);
 		free(gpt_pte);
-		return -1;
+		return -EPERM;
 	}
 
 	/* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
@@ -300,8 +299,8 @@
 			info->type_guid, UUID_STR_FORMAT_GUID);
 #endif
 
-	debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
-	      info->start, info->size, info->name);
+	log_debug("start 0x" LBAF ", size 0x" LBAF ", name %s\n", info->start,
+		  info->size, info->name);
 
 	/* Remember to free pte */
 	free(gpt_pte);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c80f8e8..3f0d9f1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 #include <common.h>
 #include <fs_internal.h>
+#include <log.h>
 #include <uuid.h>
 #include <memalign.h>
 #include "kernel-shared/btrfs_tree.h"
@@ -910,9 +911,9 @@
 
 	if (round_up(BTRFS_SUPER_INFO_SIZE + BTRFS_SUPER_INFO_OFFSET,
 		     desc->blksz) > (part->size << desc->log2blksz)) {
-		error("superblock end %u is larger than device size " LBAFU,
-				BTRFS_SUPER_INFO_SIZE + BTRFS_SUPER_INFO_OFFSET,
-				part->size << desc->log2blksz);
+		log_debug("superblock end %u is larger than device size " LBAFU,
+			  BTRFS_SUPER_INFO_SIZE + BTRFS_SUPER_INFO_OFFSET,
+			  part->size << desc->log2blksz);
 		return -EINVAL;
 	}
 
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index d49ba4a..1185cb2 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -2415,7 +2415,7 @@
 
 	return 1;
 fail:
-	printf("Failed to mount ext2 filesystem...\n");
+	log_debug("Failed to mount ext2 filesystem...\n");
 fail_noerr:
 	free(data);
 	ext4fs_root = NULL;
diff --git a/fs/fs_internal.c b/fs/fs_internal.c
index ae1cb85..111f91b 100644
--- a/fs/fs_internal.c
+++ b/fs/fs_internal.c
@@ -29,8 +29,7 @@
 	/* Check partition boundaries */
 	if ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
 	    >= partition->size) {
-		log_err("%s read outside partition " LBAFU "\n", __func__,
-			sector);
+		log_debug("read outside partition " LBAFU "\n", sector);
 		return 0;
 	}