r8169: remove unused constant RsvdMask

Since 9d3679fe ("r8169: inline rtl8169_make_unusable_by_asic")
this constant isn't used any longer, so remove it.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169_main.c

@@ -529,8 +529,6 @@ enum rtl_rx_desc_bit {
 	RxVlanTag	= (1 << 16), /* VLAN tag available */
 };
 
-#define RsvdMask	0x3fffc000
-
 #define RTL_GSO_MAX_SIZE_V1	32000
 #define RTL_GSO_MAX_SEGS_V1	24
 #define RTL_GSO_MAX_SIZE_V2	64000