[PATCH] x86: Fix CONFIG_PCI=n compile failure

[James Bottomley <James.Bottomley@HansenPartnership.com>]

This:

commit fae9a0d8ca68a14da8d2351ad3e0bf42f3b29899
Author: Glauber Costa <gcosta@redhat.com>
Date:   Tue Apr 8 13:20:56 2008 -0300

    x86: merge iommu initialization parameters

Moved the forbid_dac parameter into pci-dma.c but forgot that it's a PCI
only symbol thus causing a compile failure if CONFIG_PCI=N.  Fix by
surrounding the set clause in iommu_setup with #ifdef CONFIG_PCI

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

---

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 1972266..47c5a7a 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -202,6 +202,7 @@ static __init int iommu_setup(char *p)
 			iommu_merge = 0;
 		if (!strncmp(p, "forcesac", 8))
 			iommu_sac_force = 1;
+#ifdef CONFIG_PCI
 		if (!strncmp(p, "allowdac", 8))
 			forbid_dac = 0;
 		if (!strncmp(p, "nodac", 5))
@@ -210,6 +211,7 @@ static __init int iommu_setup(char *p)
 			forbid_dac = -1;
 			return 1;
 		}
+#endif
 #ifdef CONFIG_SWIOTLB
 		if (!strncmp(p, "soft", 4))
 			swiotlb = 1;