ppc64: Extract copy to protobuf functions
ppc64: Extract copy to protobuf functions

Since the Transactional memory state will contains VSX, VMX and FP
registers, extracting the common code copying data to protobuf buffer in
separate functions.

Signed-off-by: Laurent Dufour <a59ffce977ae3d39bdc87f81ff88b229ad58db88@linux.vnet.ibm.com>
Reviewed-by: Dmitry Safonov <5aea3f9692c8a01793193334616ae8fad2bc748a@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu