board: STiH410-B2260: set ramdisk_addr_r to 0x48000000

Add missing ramdisk_addr_r param and set it to 0x48000000

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/configs/stih410-b2260.h

@@ -38,6 +38,7 @@
 			"scriptaddr=0x50000000\0"		\
 			"fdt_high=0xffffffffffffffff\0"		\
 			"initrd_high=0xffffffffffffffff\0"	\
+			"ramdisk_addr_r=0x48000000\0"		\
 			BOOTENV