Move heavy stuff from brcm-patchram-plus from device specific layers to meta-asteroid

recipes-android/brcm-patchram-plus/brcm-patchram-plus/patchram.service

+[Unit]
+Description=Load firmware into BCM20715A1 bluetooth chip
+After=dev-ttyHS99.device
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/patchram.sh
+
+[Install]
+WantedBy=basic.target

recipes-android/brcm-patchram-plus/brcm-patchram-plus/patchram.sh

+#!/bin/bash
+
+echo This script should be device specific

recipes-android/brcm-patchram-plus/brcm-patchram-plus_git.bbappend

+FILESEXTRAPATHS_prepend := "${THISDIR}/brcm-patchram-plus:"
+SRC_URI += "file://patchram.service \
+            file://patchram.sh"
+LICENSE = "BSD"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+do_install_append() {
+    install -d ${D}/lib/systemd/system/multi-user.target.wants/
+    cp ${WORKDIR}/patchram.service ${D}/lib/systemd/system/
+    ln -s ../patchram.service ${D}/lib/systemd/system/multi-user.target.wants/patchram.service
+
+    install -d ${D}/usr/bin/
+    cp ${WORKDIR}/patchram.sh ${D}/usr/bin/
+    chmod +x ${D}/usr/bin/patchram.sh
+}
+
+FILES_${PN} += "/lib/systemd/system/"
+RDEPENDS_${PN} += "rfkill bash"