target-arm: remove pointless else clause in VQSHL of u64

Remove a pointless else clause in the neon_qshl_u64 helper.
Signed-off-by: NJuha Riihimäki <juha.riihimaki@nokia.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

target-arm/neon_helper.c

@@ -560,8 +560,6 @@ uint64_t HELPER(neon_qshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
         if (val) {
             val = ~(uint64_t)0;
             SET_QC();
-        } else {
-            val = 0;
         }
     } else if (shift <= -64) {
         val = 0;