firewire: core: remove condition which is always false

reread_bus_info_block() only gets to see devices whose config_rom_length
is at least 6 (ROM header, bus info block, root directory header).
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/fw-device.c

@@ -892,7 +892,7 @@ static int reread_bus_info_block(struct fw_device *device, int generation)
 		if (i == 0 && q == 0)
 			return REREAD_BIB_GONE;
 
-		if (i > device->config_rom_length || q != device->config_rom[i])
+		if (q != device->config_rom[i])
 			return REREAD_BIB_CHANGED;
 	}