smartcard: Move down spice_smartcard_reader_is_software body
smartcard: Move down spice_smartcard_reader_is_software body

It's more consistent to have it close to
spice_smartcard_reader_insert_card() et al.

elmarco/spice-gtk,elmarco/spice-gtk,flexVDI/spice-gtk,Fantu/spice-gtk,Fantu/spice-gtk,SPICE/spice-gtk,SPICE/spice-gtk,guodong/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,fgouget/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,Fantu/spice-gtk,SPICE/spice-gtk,elmarco/spice-gtk,fgouget/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,fgouget/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,guodong/spice-gtk,elmarco/spice-gtk,SPICE/spice-gtk,Fantu/spice-gtk,flexVDI/spice-gtk,guodong/spice-gtk,guodong/spice-gtk