Clean up dataflash partitioning

This patch removes the board dependent parts from
"drivers/mtd/dataflash.c".
Each board relying on this, will have the appropriate
code in a new file, "partition.c" in the board directory.
board Makefiles updated to use the file.

The dataflash partitions are aligned on sector/page boundaries.

The CONFIG_NEW_DF_PARTITION was used to create named partitions
This is now the default operation, and the CONFIG variable is removed.

Signed-off-by: Ulf Samuelsson <ulf@atmel.com>
diff --git a/board/atmel/at91cap9adk/Makefile b/board/atmel/at91cap9adk/Makefile
index 3961030..6b4b4b0 100644
--- a/board/atmel/at91cap9adk/Makefile
+++ b/board/atmel/at91cap9adk/Makefile
@@ -27,6 +27,7 @@
 
 COBJS-y	+= at91cap9adk.o
 COBJS-y	+= led.o
+COBJS-y	+= partition.o
 COBJS-$(CONFIG_CMD_NAND) += nand.o
 
 SRCS    := $(SOBJS:.o=.S) $(COBJS-y:.o=.c)