[BRIDGE]: get rid of miscdevice include

The bridge hasn't used miscdevice for a long long time.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/bridge/br_private.h

@@ -16,7 +16,6 @@
 #define _BR_PRIVATE_H
 
 #include <linux/netdevice.h>
-#include <linux/miscdevice.h>
 #include <linux/if_bridge.h>
 
 #define BR_HASH_BITS 8