ATMEL spi_dataflash driver - fix to build again

The rework effort for ATMEL (AT91/AVR32) accidentially broke build of
this driver. Fix this to make it build again. However this driver should
be reworked as soon as possible!

Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>

drivers/spi/atmel_dataflash_spi.c

@@ -21,10 +21,9 @@
 
 #include <common.h>
 #ifndef CONFIG_AT91_LEGACY
-# define CONFIG_ATMEL_LEGACY
+# define CONFIG_AT91_LEGACY
 # warning Please update to use C structure SoC access !
 #endif
-#include <common.h>
 #include <spi.h>
 #include <malloc.h>