lc15: use OsmoBTS service file

Use the file from osmo-bts master instead of local copy similar to the
way it's done for sysmobts.

Related: SYS#3686

recipes-sysmobts/osmo-bts/files/osmo-bts-lc15.service

@@ -1,20 +0,0 @@
-[Unit]
-Description=osmo-bts for LC15 / sysmoBTS 2100
-
-[Service]
-Type=simple
-ExecStartPre=/bin/sh -c 'echo 0 > /sys/class/leds/activity_led/brightness'
-ExecStart=/usr/bin/osmo-bts-lc15 -s -c /etc/osmocom/osmo-bts.cfg -M
-ExecStopPost=/bin/sh -c 'echo 0 > /sys/class/leds/activity_led/brightness'
-#FIXME: dra7-dsp1-fw.xe66 dra7-dsp2-fw.xe66 litecell15.bit-100t litecell15.bit-75t
-#ExecStopPost=/bin/sh -c 'cat /lib/firmware/sysmobts-v?.bit > /dev/fpgadl_par0 ; sleep 3s; cat /lib/firmware/sysmobts-v?.out > /dev/dspdl_dm644x_0; sleep 1s'
-Restart=always
-RestartSec=2
-RestartPreventExitStatus=1
-
-# The msg queues must be read fast enough
-CPUSchedulingPolicy=rr
-CPUSchedulingPriority=1
-
-[Install]
-WantedBy=multi-user.target

recipes-sysmobts/osmo-bts/osmo-bts_git.bb

@@ -5,7 +5,6 @@ LIC_FILES_CHKSUM="file://COPYING;md5=73f1eb20517c55bf9493b7dd6e480788"
 SRC_URI = "git://git.osmocom.org/osmo-bts.git;protocol=git;branch=sysmocom/0.3.5-stable;name=osmobts;destsuffix=git \
            git://git.osmocom.org/openbsc;protocol=git;branch=master;name=openbsc;destsuffix=openbsc \
            file://gcc6-linking-fix.patch"
-SRC_URI_append_sysmobts2100 = " file://osmo-bts-lc15.service"
 SRCREV_osmobts = "a4bd813081e788012c72f34d31150cdf02db307f"
 SRCREV_openbsc = "57ee78078905c7499bd4e6857f8981d22badfcac"
 PV = "0.4.3+git${SRCPV}"
@@ -75,7 +74,7 @@ do_install_append_sysmobts2100() {
 	# Install systemd and enable on sysinit
 	install -d ${D}${systemd_unitdir}/system/multi-user.target.wants/
 	install -m 0660 ${S}/doc/examples/litecell15/lc15bts-mgr.cfg ${D}${sysconfdir}/osmocom/
-	install -m 0644 ${WORKDIR}/osmo-bts-lc15.service ${D}${systemd_unitdir}/system/
+	install -m 0644 ${S}/contrib/osmo-bts-lc15.service ${D}${systemd_unitdir}/system/
 	ln -sf ../osmo-bts-lc15.service ${D}${systemd_unitdir}/system/multi-user.target.wants/
 }