pmac: build fix

Ensure that BLK_DEV_IDE is built-in before allowing BLK_DEV_IDE_PMAC to
be selected.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: Bret Towe <magnade@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/Kconfig

@@ -781,7 +781,7 @@ endif
 
 config BLK_DEV_IDE_PMAC
 	bool "Builtin PowerMac IDE support"
-	depends on PPC_PMAC && IDE=y
+	depends on PPC_PMAC && IDE=y && BLK_DEV_IDE=y
 	help
 	  This driver provides support for the built-in IDE controller on
 	  most of the recent Apple Power Macintoshes and PowerBooks.