[new uImage] Remove unnecessary arguments passed to ramdisk routines

boot_get_ramdisk() and image_get_ramdisk() do not need all
cmdtp, flag, argc and argv arguments. Simplify routines definition.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
diff --git a/lib_arm/bootm.c b/lib_arm/bootm.c
index 865e711..08eef0b 100644
--- a/lib_arm/bootm.c
+++ b/lib_arm/bootm.c
@@ -95,8 +95,10 @@
 		printf ("Using machid 0x%x from environment\n", machid);
 	}
 
-	boot_get_ramdisk (cmdtp, flag, argc, argv, images,
-			IH_ARCH_ARM, &initrd_start, &initrd_end);
+	ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_ARM,
+			&initrd_start, &initrd_end);
+	if (ret)
+		do_reset (cmdtp, flag, argc, argv);
 
 	show_boot_progress (15);