meta-facebook: mctp: add systemd inherit

Multiple platforms use SYSTEMD_SERVICE directives to install systemd
services without actually inheriting the systemd bbclass.  This breaks
install with later OpenEmbedded updates.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I354a9f862012e89d019dde98a662c3f7303436d6
diff --git a/meta-facebook/meta-rainiera7/recipes-phosphor/mctp/mctp_%.bbappend b/meta-facebook/meta-rainiera7/recipes-phosphor/mctp/mctp_%.bbappend
index ab73b27..6bbffe6 100644
--- a/meta-facebook/meta-rainiera7/recipes-phosphor/mctp/mctp_%.bbappend
+++ b/meta-facebook/meta-rainiera7/recipes-phosphor/mctp/mctp_%.bbappend
@@ -1,5 +1,7 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
 
+inherit systemd
+
 SRC_URI:append = " \
     file://mctpd.conf \
     file://mctp_init.service \
@@ -18,10 +20,6 @@
     rainier-mctp-i3c@0.service \
 "
 
-FILES:${PN}:append = " \
-    ${systemd_system_unitdir}/rainier-mctp-i3c@.service \
-"
-
 RDEPENDS:${PN}:append = "bash"
 
 do_install:append () {
diff --git a/meta-facebook/meta-santabarbara/recipes-phosphor/mctp/mctp_%.bbappend b/meta-facebook/meta-santabarbara/recipes-phosphor/mctp/mctp_%.bbappend
index c6b0387..f687312 100644
--- a/meta-facebook/meta-santabarbara/recipes-phosphor/mctp/mctp_%.bbappend
+++ b/meta-facebook/meta-santabarbara/recipes-phosphor/mctp/mctp_%.bbappend
@@ -1,5 +1,7 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
 
+inherit systemd
+
 SRC_URI:append = " \
     file://mctp_init.service \
     file://mctp_init.sh \
diff --git a/meta-facebook/meta-yosemite5/recipes-phosphor/mctp/mctp_%.bbappend b/meta-facebook/meta-yosemite5/recipes-phosphor/mctp/mctp_%.bbappend
index 458f726..e86ae07 100644
--- a/meta-facebook/meta-yosemite5/recipes-phosphor/mctp/mctp_%.bbappend
+++ b/meta-facebook/meta-yosemite5/recipes-phosphor/mctp/mctp_%.bbappend
@@ -1,5 +1,7 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
 
+inherit systemd
+
 SRC_URI:append = " \
     file://mctp_init.service \
     file://mctp_init.sh \