[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_avr32/bootm.c b/lib_avr32/bootm.c
index e8e537a..c9a0190 100644
--- a/lib_avr32/bootm.c
+++ b/lib_avr32/bootm.c
@@ -196,8 +196,10 @@
 	}
 	theKernel = (void *)ep;
 
-	boot_get_ramdisk (cmdtp, flag, argc, argv, images,
-			IH_ARCH_AVR32, &initrd_start, &initrd_end);
+	ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_AVR32,
+			&initrd_start, &initrd_end);
+	if (ret)
+		do_reset (cmdtp, flag, argc, argv);
 
 	show_boot_progress (15);