pinctrl: meson: extend build coverage with COMPILE_TEST=y

pinctrl: meson: extend build coverage with COMPILE_TEST=y

We currently only build these drivers on ARM but there's nothing that
should stop us from building it with allmodconfig on other
architectures. Extend the build coverage for all meson drivers.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>