omap1: DMA: move LCD related code from plat-omap to mach-omap1

All of the LCD DMA code in plat-omap/dma.c appears to be OMAP1-only (and
apparently only is available on a subset of OMAP1 chips).

Move this code to mach-omap1/lcd_dma.c.

Tested on OMAP1510 Amstrad Delta.
Compile-tested with omap_generic_2420_defconfig.

Reported-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile
index 191e0cf..9ce17f1 100644
--- a/arch/arm/mach-omap1/Makefile
+++ b/arch/arm/mach-omap1/Makefile
@@ -52,3 +52,7 @@
 led-$(CONFIG_MACH_OMAP_PERSEUS2)	+= leds-h2p2-debug.o
 led-$(CONFIG_MACH_OMAP_OSK)		+= leds-osk.o
 obj-$(CONFIG_LEDS)			+= $(led-y)
+
+ifneq ($(CONFIG_FB_OMAP),)
+obj-y += lcd_dma.o
+endif