target/arm/sme: Reset ZA state in aarch64_set_svcr()

target/arm/sme: Reset ZA state in aarch64_set_svcr()

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230112102436.1913-6-philmd@linaro.org
Message-Id: <20230112004322.161330-1-richard.henderson@linaro.org>
[PMD: Split patch in multiple tiny steps]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit fccb49182e23bd359092f7ab09bc7e60a0fff71a)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>