msm: iommu: Mark functions with the right section names

Mark the init and exit functions as __init and __exit where
appropriate.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
diff --git a/arch/arm/mach-msm/iommu.c b/arch/arm/mach-msm/iommu.c
index f71747d..134add7 100644
--- a/arch/arm/mach-msm/iommu.c
+++ b/arch/arm/mach-msm/iommu.c
@@ -585,7 +585,7 @@
 	.domain_has_cap = msm_iommu_domain_has_cap
 };
 
-static int msm_iommu_init(void)
+static int __init msm_iommu_init(void)
 {
 	register_iommu(&msm_iommu_ops);
 	return 0;