[media] omap: Fix typo "HAS_MMU"

Commit 38a07311 ("[media] omap: be sure that MMU is there for
COMPILE_TEST") added a dependency on HAS_MMU. There's no Kconfig symbol
HAS_MMU. Use MMU instead.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/omap/Kconfig

@@ -3,7 +3,8 @@ config VIDEO_OMAP2_VOUT_VRFB
 
 config VIDEO_OMAP2_VOUT
 	tristate "OMAP2/OMAP3 V4L2-Display driver"
-	depends on ARCH_OMAP2 || ARCH_OMAP3 || (COMPILE_TEST && HAS_MMU)
+	depends on MMU
+	depends on ARCH_OMAP2 || ARCH_OMAP3 || COMPILE_TEST
 	select VIDEOBUF_GEN
 	select VIDEOBUF_DMA_CONTIG
 	select OMAP2_DSS if HAS_IOMEM && ARCH_OMAP2PLUS