bootm: refactor ramdisk locating code

Move determing if we have a ramdisk and where its located into the
common code. Keep track of the ramdisk start and end in the
bootm_headers_t image struct.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/lib_arm/bootm.c b/lib_arm/bootm.c
index 5660a50..f9f702f 100644
--- a/lib_arm/bootm.c
+++ b/lib_arm/bootm.c
@@ -61,7 +61,6 @@
 void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		     bootm_headers_t *images)
 {
-	ulong	initrd_start, initrd_end;
 	bd_t	*bd = gd->bd;
 	char	*s;
 	int	machid = bd->bi_arch_number;
@@ -80,11 +79,6 @@
 		printf ("Using machid 0x%x from environment\n", machid);
 	}
 
-	ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_ARM,
-			&initrd_start, &initrd_end);
-	if (ret)
-		goto error;
-
 	show_boot_progress (15);
 
 	debug ("## Transferring control to Linux (at address %08lx) ...\n",
@@ -111,8 +105,8 @@
 	setup_commandline_tag (bd, commandline);
 #endif
 #ifdef CONFIG_INITRD_TAG
-	if (initrd_start && initrd_end)
-		setup_initrd_tag (bd, initrd_start, initrd_end);
+	if (images->rd_start && images->rd_end)
+		setup_initrd_tag (bd, images->rd_start, images->rd_end);
 #endif
 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 	setup_videolfb_tag ((gd_t *) gd);