If we don't have a ACCEL_MOUNT_MATRIX property for this device,
then check if there is a mount matrix available in sysfs.
Some kernel drivers export the mount matrix there, e.g. st_accel.
This fixes an issue where the screen was automatically rotated to
an incorrect orientation on Acer Veriton Z4660G/Z6860G/A890.
If we don't have a ACCEL_MOUNT_MATRIX property for this device, then check if there is a mount matrix available in sysfs. Some kernel drivers export the mount matrix there, e.g. st_accel.
This fixes an issue where the screen was automatically rotated to an incorrect orientation on Acer Veriton Z4660G/Z6860G/A890.