TI: DaVinci: Prepare for da850 support

DA850/OMAP-L138 is a new SoC from Texas Instruments
(http://focus.ti.com/docs/prod/folders/print/omap-l138.html).
This SoC is similar to DA830/OMAP-L137 in many aspects. Hence
rename the da830 specific files and folders to da8xx to
accommodate DA850/OMAP-L138.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Ben Gardiner <bengardiner@nanometrics.ca>
Reviewed-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/da8xxevm/Makefile

@@ -27,7 +27,10 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= da830evm.o common.o
+COBJS-y	+= common.o
+COBJS-$(CONFIG_MACH_DAVINCI_DA830_EVM)	+= da830evm.o
+
+COBJS   := $(COBJS-y)
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))