freebsd_network: Cleanup around ifmedia handling.

* Remove unused variable.

 * Use original value for IFM_AVALID, we do not need to remap this one.
   (Actually we do not need to remap IFM_ACTIVE here either, but it makes
    some things slightly easier to work with rather than remapping it
    in a different location.)

src/libs/compat/freebsd_network/compat/net/if_media.h

@@ -374,11 +374,10 @@ uint64_t	ifmedia_baudrate(int);
 /*
  * Status bits
  */
-#ifndef __HAIKU__
 #define	IFM_AVALID	0x00000001	/* Active bit valid */
+#ifndef __HAIKU__
 #define	IFM_ACTIVE	0x00000002	/* Interface attached to working net */
 #else
-#define IFM_AVALID	0x10000000	/* Active bit valid */
 #define IFM_ACTIVE	0x00800000	/* same as Haiku's */
 #endif
 

src/libs/compat/freebsd_network/device_hooks.c

@@ -299,7 +299,6 @@ compat_control(void *cookie, uint32 op, void *arg, size_t length)
 		{
 			struct ifmediareq mediareq;
 			ether_link_state_t state;
-			status_t status;
 
 			if (length < sizeof(ether_link_state_t))
 				return EINVAL;