[CLASS] Update auto-patch class to use MACHINEOVERRIDES
This change adds the usage of MACHINEOVERRIDE to create a list of folders in which to search .patch file.
Example:
PATHPATH = "${CURDIR}" MACHIEOVERRIDES = "arm:rpi:"
Folders for the research:
- ${CURDIR}/
- ${CURDIR}/arm
- ${CURDIR}/rpi
Signed-off-by: Davide Cardillo davide.cardillo@seco.com