part: Drop disk_partition_t typedef

We should not be using typedefs and these make it harder to use
forward declarations (to reduce header file inclusions). Drop the typedef.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/disk/part_dos.c b/disk/part_dos.c
index 813379f..6e2a110 100644
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -213,7 +213,7 @@
 static int part_get_info_extended(struct blk_desc *dev_desc,
 				  lbaint_t ext_part_sector, lbaint_t relative,
 				  int part_num, int which_part,
-				  disk_partition_t *info, unsigned int disksig)
+				  struct disk_partition *info, uint disksig)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
@@ -317,7 +317,7 @@
 }
 
 int part_get_info_dos(struct blk_desc *dev_desc, int part,
-		      disk_partition_t *info)
+		      struct disk_partition *info)
 {
 	return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
 }