Also adjust the include path for the device tree. Since Linux 6.5-rc1
(724ba67515 "ARM: dts: Move .dts files to vendor sub-directories"),
sama5d31.dtsi lives in the microchip subdirectory.
Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>