ARM: omap1: move plat/dma.c to mach/omap-dma.c

Most of the interface functions in plat/dma.c are only used from the
USB driver, which is practically OMAP1 specific, except for compile
testing.

The omap_get_plat_info(), omap_request_dma() and omap_free_dma()
functions are never called on omap2 because of runtime checks.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-omap1/Makefile

@@ -5,7 +5,7 @@
 
 # Common support
 obj-y := io.o id.o sram-init.o sram.o time.o irq.o mux.o flash.o \
-	 serial.o devices.o dma.o fb.o
+	 serial.o devices.o dma.o omap-dma.o fb.o
 obj-y += clock.o clock_data.o opp_data.o reset.o pm_bus.o timer.o
 
 ifneq ($(CONFIG_SND_SOC_OMAP_MCBSP),)

arch/arm/plat-omap/Makefile

@@ -6,4 +6,4 @@
 ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-omap/include
 
 # Common support
-obj-y := sram.o dma.o
+obj-y := sram.o