ASoC: eliminate left-over from Raumfeld machine driver removal

Commit f84a6273 ("ASoC: pxa: remove raumfeld machine driver")
removed the Raumfeld ASoC machine driver but forgot to kill one line
in the Makefile.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/pxa/Makefile

@@ -30,7 +30,6 @@ snd-soc-magician-objs := magician.o
 snd-soc-mioa701-objs := mioa701_wm9713.o
 snd-soc-z2-objs := z2.o
 snd-soc-imote2-objs := imote2.o
-snd-soc-raumfeld-objs := raumfeld.o
 snd-soc-brownstone-objs := brownstone.o
 snd-soc-ttc-dkb-objs := ttc-dkb.o