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

Signed-off-by: NAlan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

drivers/md/Kconfig

@@ -32,7 +32,7 @@ config BLK_DEV_MD
 
 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