MIPS: math-emu: Avoid an assignment within if statement condition

Move invocation of fpu_emu() to be out of if statement condition.

This makes code easier to follow and debug, and fixes a checkpatch
warning.

Signed-off-by: Aleksandar Markovic <aleksandar.markovic@mips.com>
Cc: Douglas Leung <douglas.leung@mips.com>
Cc: Goran Ferenc <goran.ferenc@mips.com>
Cc: James Hogan <james.hogan@mips.com>
Cc: Maciej W. Rozycki <macro@mips.com>
Cc: Miodrag Dinic <miodrag.dinic@mips.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Petar Jovanovic <petar.jovanovic@mips.com>
Cc: Raghu Gandham <raghu.gandham@mips.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17586/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/math-emu/cp1emu.c

@@ -1353,7 +1353,8 @@ branch_common:
 				return SIGILL;
 
 			/* a real fpu computation instruction */
-			if ((sig = fpu_emu(xcp, ctx, ir)))
+			sig = fpu_emu(xcp, ctx, ir);
+			if (sig)
 				return sig;
 		}
 		break;