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/common/spl/spl_ext.c b/common/spl/spl_ext.c
index 2a62522..954133b 100644
--- a/common/spl/spl_ext.c
+++ b/common/spl/spl_ext.c
@@ -15,7 +15,7 @@
 	s32 err;
 	struct image_header *header;
 	loff_t filelen, actlen;
-	disk_partition_t part_info = {};
+	struct disk_partition part_info = {};
 
 	header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
 
@@ -69,7 +69,7 @@
 {
 	int err;
 	__maybe_unused loff_t filelen, actlen;
-	disk_partition_t part_info = {};
+	struct disk_partition part_info = {};
 	__maybe_unused char *file;
 
 	if (part_get_info(block_dev, partition, &part_info)) {