fix duplicate yaml_dir config variable declaration and usage

yaml_dir is defined both in phosphor-dbus-interfaces.bbclass and
phosphor-obmc-yaml.bbclass pointing to different locations.

Fixed the same by removing usage of phosphor-dbus-interfaces

Also removed unused openpower-dbus-interfaces.bbclass

Change-Id: I74d06a0f7d635bd708f58611444061c6d48db858
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
1 file changed