Removes some functions that are not used anywhere:
kvmppc_core_load_guest_debugstate() kvmppc_core_load_host_debugstate()

This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: NRickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: NAlexander Graf <agraf@suse.de>