MIPS: Return directly in 32_mmap2()

* Return a failure indication without storing it
  in an intermediate variable.

* Delete the local variable "error" which became unnecessary
  with this refactoring.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: kernel-janitors@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15071/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/linux32.c

@@ -64,15 +64,10 @@ SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
 	unsigned long, prot, unsigned long, flags, unsigned long, fd,
 	unsigned long, pgoff)
 {
-	unsigned long error;
-
-	error = -EINVAL;
 	if (pgoff & (~PAGE_MASK >> 12))
-		goto out;
-	error = sys_mmap_pgoff(addr, len, prot, flags, fd,
+		return -EINVAL;
+	return sys_mmap_pgoff(addr, len, prot, flags, fd,
 			      pgoff >> (PAGE_SHIFT-12));
-out:
-	return error;
 }
 
 #define RLIM_INFINITY32 0x7fffffff