ext4l: Add migrate.c to the build

Add extent migration support for write operations.

Use the ext4_uboot.h compatibility layer instead of Linux headers.

Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>

fs/ext4l/Makefile

@@ -7,7 +7,7 @@ obj-y := interface.o stub.o
 
 obj-y	+= balloc.o bitmap.o block_validity.o dir.o ext4_jbd2.o extents.o \
 		extents_status.o file.o fsync.o hash.o ialloc.o \
-		indirect.o inline.o inode.o mballoc.o \
+		indirect.o inline.o inode.o mballoc.o migrate.o \
 		namei.o page-io.o readpage.o \
 		super.o symlink.o xattr.o \
 		xattr_hurd.o xattr_trusted.o \

fs/ext4l/migrate.c

@@ -5,7 +5,7 @@
  *
  */
 
-#include <linux/slab.h>
+#include "ext4_uboot.h"
 #include "ext4_jbd2.h"
 #include "ext4_extents.h"