tcg: Fix iteration step in 32-bit gvec operation

tcg: Fix iteration step in 32-bit gvec operation

The loop in the 32-bit case of the vector compare operation
was incorrectly incrementing by 8 bytes per iteration instead
of 4 bytes. This caused the function to process only half of
the intended elements.

Cc: qemu-stable@nongnu.org
Fixes: 9622c697d1 (tcg: Add gvec compare with immediate and scalar operand)
Signed-off-by: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com>
Reviewed-by: Liu Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240904142739.854-2-zhiwei_liu@linux.alibaba.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>