[POWERPC] Fix section mismatch in dart_iommu.c

These functions are only called from __init functions.

WARNING: vmlinux.o(.text+0x398f4): Section mismatch: reference to .init.text:.lmb_alloc (between '.iommu_init_early_dart' and '.pci_dma_bus_setup_dart')
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/sysdev/dart_iommu.c

@@ -204,7 +204,7 @@ static void dart_free(struct iommu_table *tbl, long index, long npages)
 }
 
 
-static int dart_init(struct device_node *dart_node)
+static int __init dart_init(struct device_node *dart_node)
 {
 	unsigned int i;
 	unsigned long tmp, base, size;
@@ -313,7 +313,7 @@ static void pci_dma_bus_setup_dart(struct pci_bus *bus)
 		PCI_DN(dn)->iommu_table = &iommu_table_dart;
 }
 
-void iommu_init_early_dart(void)
+void __init iommu_init_early_dart(void)
 {
 	struct device_node *dn;