recipes-kernel: linux-common: devicetree fixup for devtool
recipes-kernel: linux-common: devicetree fixup for devtool

In rocko branch after 'devtool modify linux-mainline' you can not build the
kernel. You will get "ERROR: Unable to parse..."

Since rocko branch a do_patch_append task with mixed shell and python can not
be parsed by the codeparser of bitbake. So we have to convert this task to a
python task.

Signed-off-by: Norbert Wesp <6da95d5bf7a9ae873d28e5fc932fdf5af58a5861@phytec.de>
Signed-off-by: Stefan Müller-Klieser <a3e08e35e4a42be768e7d0e76ae1ba321c2a66dd@phytec.de>

PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec