wlconf (wifi): Fetch wl18xx-conf.bin from the beagleboard repo.

Make sure to get the wl18xx-conf.bin file from the `beagleboard` repo (instead of the git.ti.com one). This is needed (in conjunction with the 6.1.80 kernel) to make sure the wifi interface comes up properly.

layers/meta-balena-beaglebone/recipes-connectivity/wlconf/wlconf_8.7.3.bbappend

@@ -0,0 +1,7 @@
+SRC_URI:aarch64 = "git://git.beagleboard.org/beagleboard/18xx-ti-utils.git;protocol=https;branch=R8.7_SP3-bbb.io"
+SRCREV:aarch64 = "ba027b093aa013637fcc6271c2d47f3ce99e933e"
+
+do_install:append:aarch64() {
+	install -m 0755 device-20221220-wl18xx-conf.bin ${D}${sbindir}/wlconf/
+	install -m 0755 device-20221220-wl18xx-conf.bin ${D}${nonarch_base_libdir}/firmware/ti-connectivity/wl18xx-conf.bin
+}