Convert CONFIG_SYS_NAND_ONFI_DETECTION to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_NAND_ONFI_DETECTION

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/socfpga_secu1_defconfig b/configs/socfpga_secu1_defconfig
index 963215d..2c6a0a1 100644
--- a/configs/socfpga_secu1_defconfig
+++ b/configs/socfpga_secu1_defconfig
@@ -71,6 +71,7 @@
 CONFIG_MTD_RAW_NAND=y
 CONFIG_SYS_NAND_USE_FLASH_BBT=y
 CONFIG_NAND_DENALI_DT=y
+CONFIG_SYS_NAND_ONFI_DETECTION=y
 CONFIG_SPL_NAND_DENALI=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=2
 # CONFIG_DM_SPI_FLASH is not set