mtd: nand: raw: Move CONFIG_SYS_NAND_USE_FLASH_BBT to Kconfig

Convert CONFIG_SYS_NAND_USE_FLASH_BBT to Kconfig, update defconfigs,
headers and whitelist.

Please note that this symbol already was used in Kconfig
(imply in CONFIG_NAND_ATMEL) which did not work, since this symbol was
not available in Kconfig. This changes now with this patch and all
boards with CONFIG_NAND_ATMEL will have BBT enabled. Which is what
I also need on my GARDENA AT91SAM based board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
[trini: Rework such that the configs are unchanged to start with]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/m53menlo_defconfig b/configs/m53menlo_defconfig
index 49cb37e..6d7a3dd 100644
--- a/configs/m53menlo_defconfig
+++ b/configs/m53menlo_defconfig
@@ -64,6 +64,7 @@
 CONFIG_DM_MMC=y
 CONFIG_FSL_ESDHC_IMX=y
 CONFIG_NAND=y
+CONFIG_SYS_NAND_USE_FLASH_BBT=y
 CONFIG_NAND_MXC=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y