[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/include/image.h b/include/image.h
index 681c753..6fca6f4 100644
--- a/include/image.h
+++ b/include/image.h
@@ -250,9 +250,8 @@
 int genimg_get_format (void *img_addr);
 ulong genimg_get_image (ulong img_addr);
 
-int boot_get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
-		bootm_headers_t *images, uint8_t arch,
-		ulong *rd_start, ulong *rd_end);
+int boot_get_ramdisk (int argc, char *argv[], bootm_headers_t *images,
+		uint8_t arch, ulong *rd_start, ulong *rd_end);
 
 #if defined(CONFIG_PPC) || defined(CONFIG_M68K)
 int boot_ramdisk_high (struct lmb *lmb, ulong rd_data, ulong rd_len,