[ALSA] AMD Au1x00: make driver build after cleanup

Modules: MIPS AU1x00 driver

AMD Au1x00 ALSA driver doesn't build after the recent code cleanup:

sound/mips/au1x00.c: In function 'au1000_setup_dma_link':
sound/mips/au1x00.c:173: error: 'pointer' undeclared (first use in this function)
sound/mips/au1x00.c:173: error: (Each undeclared identifier is reported only once
sound/mips/au1x00.c:173: error: for each function it appears in.)
sound/mips/au1x00.c: In function 'snd_au1000_hw_params':
sound/mips/au1x00.c:339: warning: implicit declaration of function 'snd_mask_min'

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/mips/au1x00.c

@@ -43,6 +43,7 @@
 #include <sound/core.h>
 #include <sound/initval.h>
 #include <sound/pcm.h>
+#include <sound/pcm_params.h>
 #include <sound/ac97_codec.h>
 #include <asm/mach-au1x00/au1000.h>
 #include <asm/mach-au1x00/au1000_dma.h>
@@ -153,6 +154,7 @@ au1000_setup_dma_link(struct audio_stream *stream, unsigned int period_bytes,
 {
 	struct snd_pcm_substream *substream = stream->substream;
 	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct au1000_period *pointer;
 	unsigned long dma_start;
 	int i;