[ALSA] Clean up EXPORT_SYMBOL()s in snd module

Move EXPORT_SYMBOL()s to places adjacent to functions/variables.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/isadma.c b/sound/core/isadma.c
index 1a37895..d523987 100644
--- a/sound/core/isadma.c
+++ b/sound/core/isadma.c
@@ -56,6 +56,8 @@
 	release_dma_lock(flags);
 }
 
+EXPORT_SYMBOL(snd_dma_program);
+
 /**
  * snd_dma_disable - stop the ISA DMA transfer
  * @dma: the dma number
@@ -72,6 +74,8 @@
 	release_dma_lock(flags);
 }
 
+EXPORT_SYMBOL(snd_dma_disable);
+
 /**
  * snd_dma_pointer - return the current pointer to DMA transfer buffer in bytes
  * @dma: the dma number
@@ -101,3 +105,5 @@
 	else
 		return size - result;
 }
+
+EXPORT_SYMBOL(snd_dma_pointer);