imx-vpu: bump to version 5.4.31

Also, update license file location, and add a hash file.

[Thomas: fix typo in commit title.]

Cc: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Tested-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/freescale-imx/imx-vpu/imx-vpu.hash

@@ -0,0 +1,2 @@
+# Locally computed
+sha256 a266ab317fbd866541eae506d68983bcd361f49d1162a66bb34cb8088ceec88c imx-vpu-5.4.31.bin

package/freescale-imx/imx-vpu/imx-vpu.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-IMX_VPU_VERSION = 5.4.27
+IMX_VPU_VERSION = 5.4.31
 IMX_VPU_SITE = $(FREESCALE_IMX_SITE)
 IMX_VPU_SOURCE = imx-vpu-$(IMX_VPU_VERSION).bin
 
@@ -17,7 +17,7 @@ IMX_VPU_MAKE_ENV = \
 	PLATFORM=$(BR2_PACKAGE_FREESCALE_IMX_PLATFORM)
 
 IMX_VPU_LICENSE = Freescale Semiconductor Software License Agreement
-IMX_VPU_LICENSE_FILES = EULA vpu/EULA.txt
+IMX_VPU_LICENSE_FILES = EULA COPYING
 IMX_VPU_REDISTRIBUTE = NO
 
 define IMX_VPU_EXTRACT_CMDS