updated ENC624j6net driver

- fixes to gcc native and cross compilation settings
  - implemented hardware based multicast filtering hashes, resulting
    in less unwanted traffic to our Amigas (especially Bonjour, UPNP and such)
  - MULTICAST option in envarc:sana2/enc624j6net.config will now
    allow all multicast traffic as opposed to the default fine grained
    filtering behaviour

Driver/baxnet/source/enc624j6net/enc624j6l.h

@@ -239,8 +239,9 @@ ASM SAVEDS int enc624j6l_SetOnline( ASMR(a0) void *board           ASMREG(a0) );
            >=0 - OK
 */
 ASM SAVEDS int enc624j6l_bc_mc_filter( 
-                               ASMR(a0) void *board         ASMREG(a0),
-                               ASMR(d1) unsigned long flags ASMREG(d1) );
+                               ASMR(a0) void *board               ASMREG(a0),
+                               ASMR(d1) unsigned long   flags     ASMREG(d1),
+			       ASMR(a1) unsigned short *mc_hashes ASMREG(a1));
 
 
 /*