Kconfig: Add CMD_SPL_NOR_OFS config for falcon boot argument offset

This option will provide the offset in the parallel NOR flash memory to,
which the falcon boot data is stored.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index d9d26e6..a278ea3 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -334,6 +334,14 @@
 	  for full information about how to use this option (and also see
 	  board/gateworks/gw_ventana/README for an example).
 
+config CMD_SPL_NOR_OFS
+	hex "Offset of OS args or dtb for Falcon-mode NOR boot"
+	depends on CMD_SPL && SPL_NOR_SUPPORT
+	default 0
+	help
+	  This provides the offset of the command line arguments or dtb for
+	  Linux when booting from NOR in Falcon mode.
+
 config CMD_SPL_WRITE_SIZE
 	hex "Size of argument area"
 	depends on CMD_SPL