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/pcm052_defconfig b/configs/pcm052_defconfig
index 59cebf8..2328403 100644
--- a/configs/pcm052_defconfig
+++ b/configs/pcm052_defconfig
@@ -49,6 +49,7 @@
 CONFIG_DM_MTD=y
 CONFIG_NAND_VF610_NFC=y
 CONFIG_NAND_VF610_NFC_DT=y
+CONFIG_SYS_NAND_ONFI_DETECTION=y
 CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y