net/ipv6: Move dst flags to booleans in fib entries

Continuing to wean FIB paths off of dst_entry, use a bool to hold
requests for certain dst settings. Add a helper to convert the
flags to DST flags when a FIB entry is converted to a dst_entry.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip6_fib.h

@@ -177,7 +177,10 @@ struct rt6_info {
 	u8				fib6_type;
 	u8				exception_bucket_flushed:1,
 					should_flush:1,
-					unused:6;
+					dst_nocount:1,
+					dst_nopolicy:1,
+					dst_host:1,
+					unused:3;
 
 	unsigned long			expires;
 	struct dst_metrics		*fib6_metrics;