android: boot: support boot image header version 3 and 4

Enable the support for boot image header version 3 and 4
using abootimg command.

In order to use version 3 or 4:

1- Vendor boot image address should be given to abootimg cmd.

	abootimg addr $1 $vendor_boot_load_addr

2- "ramdisk_addr_r" env variable (ramdisk address) should be set to host
the ramdisk : generic ramdisk + vendor ramdisk

Replace "struct andr_boot_img_hdr_v0*" by "void *" in
some functions since v3 and v4 are now supported as well.

Signed-off-by: Safae Ouajih <souajih@baylibre.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

boot/image-fdt.c

@@ -529,7 +529,7 @@ int boot_get_fdt(int flag, int argc, char *const argv[], uint8_t arch,
 		}
 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 	} else if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID) {
-		struct andr_boot_img_hdr_v0 *hdr = buf;
+		void *hdr = buf;
 		ulong		fdt_data, fdt_len;
 		u32			fdt_size, dtb_idx;
 		/*