imx-kobs: switch to open source version

The tools "kobs-ng" will be maintained as a open source project.
The repository location is https://github.com/NXPmicro/imx-kobs

This patch is based on the Yocto equivalent:
https://github.com/Freescale/meta-freescale/commit/c23736b3

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/freescale-imx/imx-kobs/imx-kobs.hash

@@ -1 +1 @@
-sha256	85171b46068ac47c42fedb8104167bf9afd33dd9527ed127e1ca2eb29d7a86bf  imx-kobs-5.4.tar.gz
+sha256	5b040de6e3db5d47371b311e7068380926827a7a6ef02e45fb2ba08b680d0ec5  imx-kobs-b402243a04e5a6760a860445e5ff6a931d86f794.tar.gz

package/freescale-imx/imx-kobs/imx-kobs.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-IMX_KOBS_VERSION = 5.4
-IMX_KOBS_SITE = $(FREESCALE_IMX_SITE)
+IMX_KOBS_VERSION = b402243a04e5a6760a860445e5ff6a931d86f794
+IMX_KOBS_SITE = $(call github,NXPmicro,imx-kobs,$(IMX_KOBS_VERSION))
 IMX_KOBS_LICENSE = GPLv2+
 IMX_KOBS_LICENSE_FILES = COPYING