common: Drop part.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index 5bf78b5..9adef57 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -19,10 +19,12 @@
  */
 
 #include <common.h>
+#include <blk.h>
 #include <ext_common.h>
 #include <ext4fs.h>
 #include <malloc.h>
 #include <memalign.h>
+#include <part.h>
 #include <stddef.h>
 #include <linux/stat.h>
 #include <linux/time.h>
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
index 0ceb73d..2a8d397 100644
--- a/fs/ext4/ext4_journal.c
+++ b/fs/ext4/ext4_journal.c
@@ -14,6 +14,7 @@
  */
 
 #include <common.h>
+#include <blk.h>
 #include <ext4fs.h>
 #include <malloc.h>
 #include <ext_common.h>
diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
index 67aeba1..ce1fddc 100644
--- a/fs/ext4/ext4_write.c
+++ b/fs/ext4/ext4_write.c
@@ -22,8 +22,10 @@
 
 
 #include <common.h>
+#include <blk.h>
 #include <malloc.h>
 #include <memalign.h>
+#include <part.h>
 #include <linux/stat.h>
 #include <div64.h>
 #include "ext4_common.h"
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index ad71f5a..4c89152 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -21,11 +21,13 @@
  */
 
 #include <common.h>
+#include <blk.h>
 #include <ext_common.h>
 #include <ext4fs.h>
 #include "ext4_common.h"
 #include <div64.h>
 #include <malloc.h>
+#include <part.h>
 #include <uuid.h>
 
 int ext4fs_symlinknest;