x86: move x86/pci to the common lib

Also move pci_config_read into asm/pci.h

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Message-Id: <1453140064-9040-7-git-send-email-drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
6 files changed