[PATCH] fix "optimize && ?"

This prevents the "optimize && ?" message appearing when the kernel
configuration tool is run.  The message could be eliminated from the
tool, but I'd rather fix the needlessly over-complicated expression:

drivers/block/Kconfig

@@ -330,7 +330,7 @@ config BLK_DEV_RAM_SIZE
 
 config BLK_DEV_INITRD
 	bool "Initial RAM disk (initrd) support"
-	depends on BLK_DEV_RAM && BLK_DEV_RAM!=m
+	depends on BLK_DEV_RAM=y
 	help
 	  The initial RAM disk is a RAM disk that is loaded by the boot loader
 	  (loadlin or lilo) and that is mounted as root before the normal boot