cmd_mem: Store last address/size/etc as ulong

Otherwise the high 32 bits get truncated on 64-bit U-boot.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: York Sun <yorksun@freescale.com>

common/cmd_mem.c

@@ -36,9 +36,9 @@ static int mod_mem(cmd_tbl_t *, int, int, int, char * const []);
 /* Display values from last command.
  * Memory modify remembered values are different from display memory.
  */
-static uint	dp_last_addr, dp_last_size;
-static uint	dp_last_length = 0x40;
-static uint	mm_last_addr, mm_last_size;
+static ulong	dp_last_addr, dp_last_size;
+static ulong	dp_last_length = 0x40;
+static ulong	mm_last_addr, mm_last_size;
 
 static	ulong	base_address = 0;