add board specific code to layer

recipes-core/base-files/base-files_%.bbappend

@@ -1,7 +1,10 @@
 hostname = "diya"
 
 do_install:append () {
-cat << EOF >> "${D}${sysconfdir}/modules"
+    cat << 'EOF' >> "${D}${sysconfdir}/profile"
+export DISK="mmcblk1"
+EOF
+    cat << EOF >> "${D}${sysconfdir}/modules"
 uwe5622_bsp_sdio
 sprdwl_ng
 sprdbt_tty

recipes-core/images/core-image-recovery.bbapend

@@ -0,0 +1,7 @@
+image_patch:append () {
+    # create /etc/fstab
+    cat << EOF > ${IMAGE_ROOTFS}/etc/fstab
+/dev/mmcblk1p1       /boot          auto       defaults  0  0
+/dev/mmcblk1p4       /home          auto       defaults  0  0
+EOF
+}