arm/cpu: fix trailing ',' for SET_IDREG

arm/cpu: fix trailing ',' for SET_IDREG

While a trailing comma is not broken for SET_IDREG invocations, it
does look odd; use a semicolon instead.

Fixes: f1fd81291c91 ("arm/cpu: Store aa64mmfr0-3 into the idregs array")
Fixes: def3f1c1026a ("arm/cpu: Store aa64dfr0/1 into the idregs array")
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20250704141927.38963-4-cohuck@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>