[TG3]: Add TG3_FLG2_IS_NIC flag.

Add Tg3_FLG2_IS_NIC flag to unambiguously determine whether the
device is NIC or onboard.  Previously, the EEPROM_WRITE_PROT flag was
overloaded to also mean onboard.  With the separation, we can
support some devices that are onboard but do not use eeprom write
protect.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.h

@@ -2233,6 +2233,7 @@ struct tg3 {
 #define TG3_FLG2_PCI_EXPRESS		0x00000200
 #define TG3_FLG2_ASF_NEW_HANDSHAKE	0x00000400
 #define TG3_FLG2_HW_AUTONEG		0x00000800
+#define TG3_FLG2_IS_NIC			0x00001000
 #define TG3_FLG2_PHY_SERDES		0x00002000
 #define TG3_FLG2_CAPACITIVE_COUPLING	0x00004000
 #define TG3_FLG2_FLASH			0x00008000