Remove alpha vtophys() hack from if_bgereg.h and clean up unneeded

#includes formerly required to pull in vtophys support, since we
don't need them anymore.

sys/dev/bge/if_bge.c

@@ -91,8 +91,6 @@ __FBSDID("$FreeBSD$");
 #include <netinet/in.h>
 #include <netinet/ip.h>
 
-#include <vm/vm.h>              /* for vtophys */
-#include <vm/pmap.h>            /* for vtophys */
 #include <machine/clock.h>      /* for DELAY */
 #include <machine/bus_memio.h>
 #include <machine/bus.h>

sys/dev/bge/if_bgereg.h

@@ -2288,8 +2288,3 @@ struct bge_softc {
 	char			*bge_vpd_prodname;
 	char			*bge_vpd_readonly;
 };
-
-#ifdef __alpha__
-#undef vtophys
-#define vtophys(va)		alpha_XXX_dmamap((vm_offset_t)va)
-#endif