IPM: remove defconfig/proj setting of IPM drivers

Now that IPM drivers are enabled based on devicetree we can
remove any cases of them getting enabled by Kconfig, *defconfig*,
and *.conf files.

We need to remove any cases of them getting enabled by
Kconfig.defconfig* files as this can lead to errors.

Signed-off-by: Kumar Gala <kumar.gala@intel.com>