OMAP4: dma: Correct CPU version check for dma_common_ch_end

CCDN is the last common channel register in all OMAP4 versions. Use
cpu_is_omap44xx() instead of the cpu_is_omap4430().
cpu_is_omap4430() returns 0 unconditionally. This causes that the
dma_common_ch_end register variable is not configured correctly on OMAP4, not
even for OMAP4430.
Because of this, registers between CCFN - CCDN will be not cleard in the
omap2_clear_dma function in OMAP4.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/dma.c

@@ -227,7 +227,7 @@ static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
 
 	dma_stride		= OMAP2_DMA_STRIDE;
 	dma_common_ch_start	= CSDP;
-	if (cpu_is_omap3630() || cpu_is_omap4430())
+	if (cpu_is_omap3630() || cpu_is_omap44xx())
 		dma_common_ch_end = CCDN;
 	else
 		dma_common_ch_end = CCFN;