ARM: at91: enable on flash bbt for Atmel Reference and DT boards

Enable it on Calao board too as they are in DT too.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/arch/arm/mach-at91/board-rm9200dk.c b/arch/arm/mach-at91/board-rm9200dk.c
index d0ec166..01332aa 100644
--- a/arch/arm/mach-at91/board-rm9200dk.c
+++ b/arch/arm/mach-at91/board-rm9200dk.c
@@ -151,6 +151,7 @@
 	.rdy_pin	= AT91_PIN_PC2,
 	.enable_pin	= -EINVAL,
 	.ecc_mode	= NAND_ECC_SOFT,
+	.on_flash_bbt	= 1,
 	.parts		= dk_nand_partition,
 	.num_parts	= ARRAY_SIZE(dk_nand_partition),
 };