MIPS: Fix trailing semicolon

The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.

Fixes: d0f0f63a ("MIPS: Rewrite csum_fold to plain C.")
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Cc: Joe Perches <joe@perches.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18517/Signed-off-by: James Hogan <jhogan@kernel.org>

arch/mips/include/asm/checksum.h

@@ -110,7 +110,7 @@ __wsum csum_partial_copy_nocheck(const void *src, void *dst,
  */
 static inline __sum16 csum_fold(__wsum csum)
 {
-	u32 sum = (__force u32)csum;;
+	u32 sum = (__force u32)csum;
 
 	sum += (sum << 16);
 	csum = (sum < csum);