target/arm: Fix typo in helper_sve_movz_d

Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 20180801123111.3595-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 054e7ad)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

target/arm/sve_helper.c

@@ -1042,7 +1042,7 @@ void HELPER(sve_movz_d)(void *vd, void *vn, void *vg, uint32_t desc)
     uint64_t *d = vd, *n = vn;
     uint8_t *pg = vg;
     for (i = 0; i < opr_sz; i += 1) {
-        d[i] = n[1] & -(uint64_t)(pg[H1(i)] & 1);
+        d[i] = n[i] & -(uint64_t)(pg[H1(i)] & 1);
     }
 }