MIPS: Use generic csum_tcpudp_magic for MIPS.

Its implementation is identical to MIPS.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/checksum.h

@@ -199,19 +199,6 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr,
 }
 #define csum_tcpudp_nofold csum_tcpudp_nofold
 
-/*
- * computes the checksum of the TCP/UDP pseudo-header
- * returns a 16-bit checksum, already complemented
- */
-static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
-						   unsigned short len,
-						   unsigned short proto,
-						   __wsum sum)
-{
-	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
-}
-#define csum_tcpudp_magic csum_tcpudp_magic
-
 /*
  * this routine is used for miscellaneous IP-like checksums, mainly
  * in icmp.c