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/pcm058_defconfig b/configs/pcm058_defconfig
index 0adfb98..aefd91a 100644
--- a/configs/pcm058_defconfig
+++ b/configs/pcm058_defconfig
@@ -68,6 +68,7 @@
 CONFIG_SYS_NAND_USE_FLASH_BBT=y
 CONFIG_NAND_MXS=y
 CONFIG_NAND_MXS_DT=y
+CONFIG_SYS_NAND_ONFI_DETECTION=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000