btrfs-progs: inspect: fix warnings reported by -Wmissing-prototypes

When compiling on a system with gcc 12.2.1, the following warning is
generated. It can be fixed by adding a static storage class specifier.

cmds/inspect.c:733:5: warning: no previous prototype for ‘cmp_cse_devid_start’ [-Wmissing-prototypes]
  733 | int cmp_cse_devid_start(const void *va, const void *vb)
      |     ^~~~~~~~~~~~~~~~~~~
cmds/inspect.c:754:5: warning: no previous prototype for ‘cmp_cse_devid_lstart’ [-Wmissing-prototypes]
  754 | int cmp_cse_devid_lstart(const void *va, const void *vb)
      |     ^~~~~~~~~~~~~~~~~~~~
cmds/inspect.c:775:5: warning: no previous prototype for ‘print_list_chunks’ [-Wmissing-prototypes]
  775 | int print_list_chunks(struct list_chunks_ctx *ctx, unsigned sort_mode,
      |     ^~~~~~~~~~~~~~~~~

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: asj

cmds/inspect.c

@@ -730,7 +730,7 @@ struct list_chunks_ctx {
 	struct list_chunks_entry *stats;
 };
 
-int cmp_cse_devid_start(const void *va, const void *vb)
+static int cmp_cse_devid_start(const void *va, const void *vb)
 {
 	const struct list_chunks_entry *a = va;
 	const struct list_chunks_entry *b = vb;
@@ -751,7 +751,7 @@ int cmp_cse_devid_start(const void *va, const void *vb)
 	return 1;
 }
 
-int cmp_cse_devid_lstart(const void *va, const void *vb)
+static int cmp_cse_devid_lstart(const void *va, const void *vb)
 {
 	const struct list_chunks_entry *a = va;
 	const struct list_chunks_entry *b = vb;
@@ -772,8 +772,8 @@ int cmp_cse_devid_lstart(const void *va, const void *vb)
 	return 1;
 }
 
-int print_list_chunks(struct list_chunks_ctx *ctx, unsigned sort_mode,
-		      unsigned unit_mode, bool with_usage, bool with_empty)
+static int print_list_chunks(struct list_chunks_ctx *ctx, unsigned sort_mode,
+			     unsigned unit_mode, bool with_usage, bool with_empty)
 {
 	u64 devid;
 	struct list_chunks_entry e;