ARM: OMAP2/3: sDMA: Correct omap_request_dma_chain(), v2

Original OMAP DMA chaining design had chain_id as one of the callback
parameters. Patch 538528d changed it
to use logical channel instead.

Correct the naming for callback to also use logical channel number
instead of the chain_id.

More details are on this email thread:

http://marc.info/?l=linux-omap&m=122961071931459&w=2

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/plat-omap/dma.c

@@ -1220,7 +1220,7 @@ static void create_dma_lch_chain(int lch_head, int lch_queue)
  * 	     Failure: -EINVAL/-ENOMEM
  */
 int omap_request_dma_chain(int dev_id, const char *dev_name,
-			   void (*callback) (int chain_id, u16 ch_status,
+			   void (*callback) (int lch, u16 ch_status,
 					     void *data),
 			   int *chain_id, int no_of_chans, int chain_mode,
 			   struct omap_dma_channel_params params)

arch/arm/plat-omap/include/mach/dma.h

@@ -532,7 +532,7 @@ extern int omap_get_dma_index(int lch, int *ei, int *fi);
 /* Chaining APIs */
 #ifndef CONFIG_ARCH_OMAP1
 extern int omap_request_dma_chain(int dev_id, const char *dev_name,
-				  void (*callback) (int chain_id, u16 ch_status,
+				  void (*callback) (int lch, u16 ch_status,
 						    void *data),
 				  int *chain_id, int no_of_chans,
 				  int chain_mode,