skge: remove broken and unused PHY_M_PC_MDI_XMODE macro

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/skge.h

@@ -1351,8 +1351,6 @@ enum {
 	PHY_M_PC_EN_DET_PLUS	= 3<<8, /* Energy Detect Plus (Mode 2) */
 };
 
-#define PHY_M_PC_MDI_XMODE(x)	((((u16)(x)<<5) & PHY_M_PC_MDIX_MSK)
-
 enum {
 	PHY_M_PC_MAN_MDI	= 0, /* 00 = Manual MDI configuration */
 	PHY_M_PC_MAN_MDIX	= 1, /* 01 = Manual MDIX configuration */