[ARM] pxa: simplify DMA register definitions

1. DRCMRxx is no longer recommended, use DRCMR(xx) instead, and
   pass DRCMR index by "struct resource" if possible

2. DCSRxx, DDADRxx, DSADRxx, DTADRxx, DCMDxx is never used, use
   DCSR(), DDADR(), DSADR(), DTADR(), DCMD() instead

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

sound/soc/pxa/pxa2xx-i2s.c

@@ -44,7 +44,7 @@ static struct clk *clk_i2s;
 static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_out = {
 	.name			= "I2S PCM Stereo out",
 	.dev_addr		= __PREG(SADR),
-	.drcmr			= &DRCMRTXSADR,
+	.drcmr			= &DRCMR(3),
 	.dcmd			= DCMD_INCSRCADDR | DCMD_FLOWTRG |
 				  DCMD_BURST32 | DCMD_WIDTH4,
 };
@@ -52,7 +52,7 @@ static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_out = {
 static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_in = {
 	.name			= "I2S PCM Stereo in",
 	.dev_addr		= __PREG(SADR),
-	.drcmr			= &DRCMRRXSADR,
+	.drcmr			= &DRCMR(2),
 	.dcmd			= DCMD_INCTRGADDR | DCMD_FLOWSRC |
 				  DCMD_BURST32 | DCMD_WIDTH4,
 };