[PATCH 4/7] x86: remove a stray reference to pci-nommu.c

[Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>]

This is just the minimal workaround.  The file file is mostly either stale
and/or duplicative of Documentation/admin-guide/kernel-parameters.txt,
but that is much more work than I'm willing to do right now.

Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
---
 Documentation/x86/x86_64/boot-options.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/x86/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt
index b297c48389b9..153b3a57fba2 100644
--- a/Documentation/x86/x86_64/boot-options.txt
+++ b/Documentation/x86/x86_64/boot-options.txt
@@ -187,9 +187,9 @@ PCI
 
 IOMMU (input/output memory management unit)
 
- Currently four x86-64 PCI-DMA mapping implementations exist:
+ Multiple x86-64 PCI-DMA mapping implementations exist, for example:
 
-   1. <arch/x86_64/kernel/pci-nommu.c>: use no hardware/software IOMMU at all
+   1. <lib/dma-direct.c>: use no hardware/software IOMMU at all
       (e.g. because you have < 3 GB memory).
       Kernel boot message: "PCI-DMA: Disabling IOMMU"
 
-- 
2.17.0