ARC: bitops: Remove unecessary operation and value

The 1-bit shift rotation to the left on x variable located on
4   last if statement can be removed because the computed value is will
not be used afront.
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/include/asm/bitops.h

@@ -243,10 +243,8 @@ static inline int constant_fls(unsigned int x)
 		x <<= 2;
 		r -= 2;
 	}
-	if (!(x & 0x80000000u)) {
-		x <<= 1;
+	if (!(x & 0x80000000u))
 		r -= 1;
-	}
 	return r;
 }