drm: ci: arm64.config: Enable DA9211 regulator

Mediatek mt8173 board fails to boot with DA9211 regulator disabled.
Enable CONFIG_REGULATOR_DA9211=y in arm64.config to fix mt8173 boot
issue.

Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Vignesh Raman <vignesh.raman@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231207091831.660054-4-vignesh.raman@collabora.com