ASoC: fix pxa-ssp compiling issue under mach-mmp

pxa-ssp.c uses API like cpu_is_pxa3xx(), cpu_is_pxa2xx(), which is
defined under arch-pxa architecture, and drivers under mach-mmp
can't find it. so just use ssp->type to replace that API.

Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h
index f9fe15e..f366320 100644
--- a/include/linux/pxa2xx_ssp.h
+++ b/include/linux/pxa2xx_ssp.h
@@ -160,6 +160,7 @@
 	PXA25x_SSP,  /* pxa 210, 250, 255, 26x */
 	PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
 	PXA27x_SSP,
+	PXA3xx_SSP,
 	PXA168_SSP,
 	PXA910_SSP,
 	CE4100_SSP,