dt-bindings: Add Infineon TLV493D-A1B6

The Infineon TLV493D-A1B6 is an I2C-based 3D Magnetic Sensor.

Cc: Marius Tarcatu <marius.tarcatu@infineon.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>