Remove leftover #endif after introducing SO_REUSEPORT

Commit 055dc21a (soreuseport: infrastructure) removed the #if 0
around SO_REUSEPORT without removing the corresponding #endif
thus causing the header guard to close early.

Cc: Tom Herbert <therbert@google.com>
Signed-off-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/mips/include/uapi/asm/socket.h

@@ -29,7 +29,6 @@
 				   socket to transmit pending data.  */
 #define SO_OOBINLINE 0x0100	/* Receive out-of-band data in-band.  */
 #define SO_REUSEPORT 0x0200	/* Allow local address and port reuse.  */
-#endif
 
 #define SO_TYPE		0x1008	/* Compatible name for SO_STYLE.  */
 #define SO_STYLE	SO_TYPE	/* Synonym */