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/cmd/bcb.c b/cmd/bcb.c
index 9626f2c..62f9a44 100644
--- a/cmd/bcb.c
+++ b/cmd/bcb.c
@@ -112,7 +112,7 @@
 		       char * const argv[])
 {
 	struct blk_desc *desc;
-	disk_partition_t info;
+	struct disk_partition info;
 	u64 cnt;
 	char *endp;
 	int part, ret;
@@ -252,7 +252,7 @@
 			char * const argv[])
 {
 	struct blk_desc *desc;
-	disk_partition_t info;
+	struct disk_partition info;
 	u64 cnt;
 	int ret;