Add layer.conf

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>

conf/layer.conf

@@ -0,0 +1,15 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have a recipes-* directories, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+	${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "stm-st-stm32mp"
+BBFILE_PATTERN_stm-st-stm32mp := "^${LAYERDIR}/"
+BBFILE_PRIORITY_stm-st-stm32mp = "6"
+
+# This should only be incremented on significant changes that will
+# cause compatibility issues with other layers
+LAYERVERSION_stm-st-stm32mp = "1"
+LAYERSERIES_COMPAT_stm-st-stm32mp = "thud"