ARM: bootm: Try to use relocated ramdisk

After boot_ramdisk_high(), ramdisk would be relocated to
initrd_start & initrd_end, so use them instead of rd_start & rd_end.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/lib/bootm.c

@@ -225,7 +225,17 @@ static void boot_prep_linux(bootm_headers_t *images)
 		if (BOOTM_ENABLE_MEMORY_TAGS)
 			setup_memory_tags(gd->bd);
 		if (BOOTM_ENABLE_INITRD_TAG) {
-			if (images->rd_start && images->rd_end) {
+			/*
+			 * In boot_ramdisk_high(), it may relocate ramdisk to
+			 * a specified location. And set images->initrd_start &
+			 * images->initrd_end to relocated ramdisk's start/end
+			 * addresses. So use them instead of images->rd_start &
+			 * images->rd_end when possible.
+			 */
+			if (images->initrd_start && images->initrd_end) {
+				setup_initrd_tag(gd->bd, images->initrd_start,
+						 images->initrd_end);
+			} else if (images->rd_start && images->rd_end) {
 				setup_initrd_tag(gd->bd, images->rd_start,
 						 images->rd_end);
 			}