ethernet: cirrus: Remove unused macros

Remove a couple of unused #defines in cs89x0.h.
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cirrus/cs89x0.h

@@ -459,7 +459,3 @@
 #define PNP_CNF_INT 0x70
 #define PNP_CNF_DMA 0x74
 #define PNP_CNF_MEM 0x48
-
-#define BIT0 1
-#define BIT15 0x8000
-