ARM: socfpga: remove unneeded CONFIG_SYS_NAND_USE_FLASH_BBT

Neither denali.c nor denali_spl.c references this option.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

include/configs/socfpga_common.h

@@ -293,7 +293,6 @@ unsigned int cm_get_qspi_controller_clk_hz(void);
 
 /* SPL NAND boot support */
 #ifdef CONFIG_SPL_NAND_SUPPORT
-#define CONFIG_SYS_NAND_USE_FLASH_BBT
 #define CONFIG_SYS_NAND_BAD_BLOCK_POS	0
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x40000
 #endif