tpm: move to a sub layer

Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-tpm/conf/layer.conf

@@ -0,0 +1,13 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have a recipes directory, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes*/*/*.bb ${LAYERDIR}/recipes*/*/*.bbappend ${LAYERDIR}/classes/*.bbclass"
+
+BBFILE_COLLECTIONS += "tpm-layer"
+BBFILE_PATTERN_tpm-layer = "^${LAYERDIR}/"
+BBFILE_PRIORITY_tpm-layer = "6"
+
+LAYERDEPENDS_tpm-layer = " \
+    core \
+"

meta-tpm/recipes-kernel/linux/linux-yocto_4.10.bbappend

@@ -0,0 +1,5 @@
+#
+# TPM kernel support
+
+KERNEL_FEATURES_append += "${@bb.utils.contains('DISTRO_FEATURES', 'tpm', ' features/tpm/tpm.scc', '', d)}"
+

recipes-kernel/linux/linux-yocto_4.10.bbappend

@@ -1,8 +1,5 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-4.10:"
 
-# TPM kernel support
-KERNEL_FEATURES_append += "${@bb.utils.contains('DISTRO_FEATURES', 'tpm', ' features/tpm/tpm.scc', '', d)}"
-
 SRC_URI += "\
         ${@bb.utils.contains('DISTRO_FEATURES', 'apparmor', ' file://apparmor.cfg', '', d)} \
 "