raid, fastboot: hide RAID autodetect option if MD is compiled as a module

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 8e72c91..2281b50 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -32,7 +32,7 @@
 
 config MD_AUTODETECT
 	bool "Autodetect RAID arrays during kernel boot"
-	depends on BLK_DEV_MD
+	depends on BLK_DEV_MD=y
 	default y
 	---help---
 	  If you say Y here, then the kernel will try to autodetect raid