IIO Sensor Y Axis is inverted for TrekStor Surftab W1.
When iio-sensor-proxy is running, up is down and down is up.
This fixes the inversion.
sensor:modalias:acpi:KIOX000A*:dmi:*:svnTREKSTOR*:pnPrimetabS11B:*
sensor:modalias:acpi:KIOX000A*:dmi:*:svnTREKSTOR:pnPrimetabT13B:*
sensor:modalias:acpi:BOSC0200*:dmi:*:svnTrekStor*:pnSurfTabtwin11.6:*
+sensor:modalias:acpi:BOSC0200*:dmi:*:svnTrekStor*:pnSurfTabduoW110.1(VT4):*
ACCEL_MOUNT_MATRIX=1, 0, 0; 0, -1, 0; 0, 0, 1
# alternative version of Trekstor's SurfTab Twin 11.6