[PATCH] s390: fix build failure

[Sudip Mukherjee]

s390 defconfig fails with the error:
ERROR: "phys_to_pfn_t" [drivers/s390/block/dcssblk.ko] undefined!

We need CONFIG_HAS_IOMEM for phys_to_pfn_t() and for that we need to
have CONFIG_PCI.

Fixes: bfac97e7b361 ("mm, dax, pmem: introduce pfn_t")
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
---

s390 defconfig with next-20151222 is at:
https://travis-ci.org/sudipm-mukherjee/parport/jobs/98258271

 arch/s390/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 9256b48..e56b6df 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -207,3 +207,4 @@ CONFIG_CRC7=m
 # CONFIG_XZ_DEC_ARMTHUMB is not set
 # CONFIG_XZ_DEC_SPARC is not set
 CONFIG_CMM=m
+CONFIG_PCI=y
-- 
1.9.1

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