meta-witherspoon: Use separated phosphor-power packages

phosphor-power recipe is splitted into separated packages.

In packagegroup-obmc-apps.bbappend, define
POWER_SERVICE_PACKAGES_AC_SERVER to include the packages for IBM AC
servers and POWER_SERVICE_PACKAGES_RAINIER for rainier server.

The package cold-redundancy is not included yet because the repo does
not install the files yet.

In phosphor-power bbappend, use separated packages as well.
It also add phosphor-power to install the psu.json in witherspoon's
phosphor-power bbappend, which is needed for multiple packages.

Tested: Verify all the ac-server services and utils are installed into
        Witherspoon's image as before.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Ib8895261fe5ab59842e4ca8fb5e26adafdbe4c4d
2 files changed