[yocto] Kernel config fragments are no longer applied after update to Fido

[Neuer User]

Hello

I have the following kernel recipe, which is based on some help from
Bruce Ashfield last year:

-------------------------------------------------------------
inherit kernel
require recipes-kernel/linux/linux-yocto.inc

SUMMARY = "Linaro Kernel 3.14 with additional machine specific patches"

SRCREV = "91d5e90284ee69d219872e3ae42ae0eac417f7e9"
LOCALVERSION = "-cubox-i+linux4kix+${SRCPV}"

DEPENDS += "lzop-native bc-native"

FILESEXTRAPATHS_prepend := "${THISDIR}/linux-cubox-i:"

SRC_URI = "file://defconfig \
           file://videoin.cfg \
           file://dvb.cfg \
           file://networking.cfg \
           file://wlan.cfg \
           file://dm-crypt.cfg \
           file://no-caam.cfg \
           file://leds.cfg \
           file://mod-to-builtin.cfg \
           file://watchdog-nowayout.cfg \
           file://brcmfmac4330-sdio.bin \
           file://brcmfmac4330-sdio.txt \
"

SRC_URI +=
"git://github.com/linux4kix/linux-linaro-stable-mx6.git;branch=${SRCBRANCH}"
SRCBRANCH ?= "linux-linaro-lsk-v3.14-mx6"

COMPATIBLE_MACHINE = "(cubox-i)"

KERNEL_IMAGETYPE_cubox-i = "zImage"

SRCREV_machine = "${SRCREV}"
--------------------------------------------------------------


This worked nicely under yocto daisy. Now, after I migrated my recipes
to yocto fido, the recipe no longer seems to include the kernel
fragments, i.e. everything runs without errors, but the fragments are
not applied. (They are, however, copied to the build directory.)

Any idea, what the problem is or how to debug/solve it?

Thanks in advance

Michael