Convert wlanhwinit_stub to use the published SHAI interface pieces
- use epoc32/include/platform/shai/wlanhwinit.mmh to get fixed parts of the mmp file, including def files
- don't have a local copy of the def files
<layer name="power_save_display_mode_stub">
<module name="group_power_save_display_mode_stub">
<component name="group_power_save_display_mode_stub">
<unit unitID="power_save_display_mode_stub" mrp="" filter="!no_stubs" bldFile="&layer_real_source_path;\group" name="power_save_display_mode_stub" />
</component>
</module>
</layer>