ARM: OMAP2+: Remove duplicated DMA channel definitions

Many DMA channel definitions in arch/arm/mach-omap2/dma.h have been moved or
redefined in drivers without removing them from dma.h. Remove those with a
script below:

egrep '#define OMAP.*DMA' arch/arm/mach-omap2/dma.h \
	|cut -f 1 |cut -d ' ' -f 1-2 | while read -r i; do \
		if [ `git grep -c "$i" |wc -l` -gt 1 ]; then \
			echo "removing" $i; \
			sed -i "/${i}/d" arch/arm/mach-omap2/dma.h; \
		fi; \
	done

Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>