ARM: omap1: Remove unused struct 'dma_link_info'

ARM: omap1: Remove unused struct 'dma_link_info'

I think the last use of this was removed somewhere
around the two:
Commit 755cbfd8cf89 ("ARM: OMAP2+: Drop sdma interrupt handling for
mach-omap2")
and
Commit 16630718ee46 ("ARM: omap1: move plat/dma.c to mach/omap-dma.c")

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Link: https://lore.kernel.org/r/20240505202214.623612-1-linux@treblig.org
Signed-off-by: Kevin Hilman <khilman@baylibre.com>