at91sam7: fix warnings by removing dead assignments

Change-Id: I836038b3518e617291ac7d5d255a388d9486f67f
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Reviewed-on: http://openocd.zylin.com/180
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/flash/nor/at91sam7.c

@@ -1168,14 +1168,11 @@ static int get_at91sam7_info(struct flash_bank *bank, char *buf, int buf_size)
 	buf += printed;
 	buf_size -= printed;
 
-	printed = snprintf(buf, buf_size,
+	snprintf(buf, buf_size,
 		" Securitybit: %i | Nvmbits(%i): %i 0x%1.1x\n",
 		at91sam7_info->securitybit, at91sam7_info->num_nvmbits,
 		at91sam7_info->num_nvmbits_on, at91sam7_info->nvmbits);
 
-	buf += printed;
-	buf_size -= printed;
-
 	return ERROR_OK;
 }