cassini: Removing dead CASSINI_NAPI

CASSINI_NAPI doesn't exist in Kconfig, therefore removing all
references for it from the source code.
Signed-off-by: NChristoph Egger <siccegge@cs.fau.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/cassini.c

@@ -107,12 +107,7 @@
 #define cas_page_unmap(x)    kunmap_atomic((x), KM_SKB_DATA_SOFTIRQ)
 #define CAS_NCPUS            num_online_cpus()
 
-#ifdef CONFIG_CASSINI_NAPI
-#define USE_NAPI
-#define cas_skb_release(x)  netif_receive_skb(x)
-#else
 #define cas_skb_release(x)  netif_rx(x)
-#endif
 
 /* select which firmware to use */
 #define USE_HP_WORKAROUND