treewide: Drop image_header_t typedef

This is not needed and we should avoid typedefs. Use the struct instead
and rename it to indicate that it really is a legacy struct.

Signed-off-by: Simon Glass <[email protected]>

Author: sjg20

arch/arm/mach-aspeed/ast2600/spl.c

@@ -56,9 +56,9 @@ u32 spl_boot_device(void)
 	return BOOT_DEVICE_RAM;
 }
 
-struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
+struct legacy_img_hdr *spl_get_load_buffer(ssize_t offset, size_t size)
 {
-	return (struct image_header *)(CONFIG_SYS_LOAD_ADDR);
+	return (struct legacy_img_hdr *)(CONFIG_SYS_LOAD_ADDR);
 }
 
 #ifdef CONFIG_SPL_OS_BOOT

arch/arm/mach-imx/hab.c

@@ -589,7 +589,7 @@ static ulong get_image_ivt_offset(ulong img_addr)
 	switch (genimg_get_format(buf)) {
 #if CONFIG_IS_ENABLED(LEGACY_IMAGE_FORMAT)
 	case IMAGE_FORMAT_LEGACY:
-		return (image_get_image_size((image_header_t *)img_addr)
+		return (image_get_image_size((struct legacy_img_hdr *)img_addr)
 			+ 0x1000 - 1)  & ~(0x1000 - 1);
 #endif
 #if CONFIG_IS_ENABLED(FIT)