[PATCH] virtio: add HAS_IOMEM dependency to MMIO platform bus driver

[Heiko Carstens]

Fix this compile error on s390:

  CC [M]  drivers/virtio/virtio_mmio.o
drivers/virtio/virtio_mmio.c: In function 'vm_get_features':
drivers/virtio/virtio_mmio.c:107:2: error: implicit declaration of function 'writel'

Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
---
 drivers/virtio/Kconfig |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 816ed08..1a61939 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -37,7 +37,7 @@ config VIRTIO_BALLOON
 
  config VIRTIO_MMIO
  	tristate "Platform bus driver for memory mapped virtio devices (EXPERIMENTAL)"
- 	depends on EXPERIMENTAL
+ 	depends on HAS_IOMEM && EXPERIMENTAL
  	select VIRTIO
  	select VIRTIO_RING
  	---help---
-- 
1.7.7.1

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