In order to manage multiple defconfig definition for same UBOOT_CONFIG
label, to address subset of devicetree files form UBOOT_DEVICETREE list, we
implement new functionality to provide UBOOT_CONFIG labels with format:
UBOOT_CONFIG += "<uboot_config_label>_<uboot_devicetree_filter_pattern>"
As soon as UBOOT_CONFIG label contains '_' chars, we split it into two
separate parts:
- first one for UBOOT_CONFIG label (used as suffix on binary name)
- second one for pattern (used as filter on devicetree name)
Signed-off-by: Romuald JEANNE <romuald.jeanne@st.com>