[PATCH] hp_accel: Add accelerometer quirk for HP ProBook 440 G4

[Osama Khan]

Added support for HP ProBook 440 G4 laptops by including the accelerometer
orientation quirk for that device. Testing was performed based on the 
axis orientation guidelines here:
https://www.kernel.org/doc/Documentation/misc-devices/lis3lv02d
which states "If the left side is elevated, X increases (becomes positive)"

When tested, on lifting the left edge, x values became increasingly negative
thus indicating an inverted x-axis on the installed lis3lv02d chip.
This was compensated by adding an entry for this device in hp_accel.c
specifying the quirk as x_inverted. The patch was tested on a 
ProBook 440 G4 device and x-axis as well as y and z-axis values are now 
generated as per spec.

Signed-off-by: Osama Khan <osama.khan@xxxxxxxxxxxx>
---
diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
index 493d8910a74e..7b12abe86b94 100644
--- a/drivers/platform/x86/hp_accel.c
+++ b/drivers/platform/x86/hp_accel.c
@@ -240,6 +240,7 @@ static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
        AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
        AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
        AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
+       AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
        AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
        AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
        AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),