install/kms: do not look for privacy screen modules on Linux < 5.17
CONFIG_DRM_PRIVACY_SCREEN was added in Linux 5.17, so there is no need
to search for modules with a drm_privacy_screen_register symbol on
older kernels versions.
Due to an influx of spam, we have had to temporarily disable account registrations. Please write an email to accountsupport@archlinux.org, with your desired username, if you want to get access. Sorry for the inconvenience.
CONFIG_DRM_PRIVACY_SCREEN was added in Linux 5.17, so there is no need
to search for modules with a drm_privacy_screen_register symbol on
older kernels versions.