r8169: select MII in Kconfig

drivers/built-in.o: In function `rtl8169_gset_xmii':
r8169.c:(.text+0x82259): undefined reference to `mii_ethtool_gset'

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index c25f0d6..8d222e4 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2057,6 +2057,7 @@
 	tristate "Realtek 8169 gigabit ethernet support"
 	depends on PCI
 	select CRC32
+	select MII
 	---help---
 	  Say Y here if you have a Realtek 8169 PCI Gigabit Ethernet adapter.