drm/msm: make iommu port names const'ier

Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/msm_iommu.c

@@ -31,13 +31,15 @@ static int msm_fault_handler(struct iommu_domain *iommu, struct device *dev,
 	return 0;
 }
 
-static int msm_iommu_attach(struct msm_mmu *mmu, const char **names, int cnt)
+static int msm_iommu_attach(struct msm_mmu *mmu, const char * const *names,
+			    int cnt)
 {
 	struct msm_iommu *iommu = to_msm_iommu(mmu);
 	return iommu_attach_device(iommu->domain, mmu->dev);
 }
 
-static void msm_iommu_detach(struct msm_mmu *mmu, const char **names, int cnt)
+static void msm_iommu_detach(struct msm_mmu *mmu, const char * const *names,
+			     int cnt)
 {
 	struct msm_iommu *iommu = to_msm_iommu(mmu);
 	iommu_detach_device(iommu->domain, mmu->dev);

drivers/gpu/drm/msm/msm_mmu.h

@@ -21,8 +21,8 @@
 #include <linux/iommu.h>
 
 struct msm_mmu_funcs {
-	int (*attach)(struct msm_mmu *mmu, const char **names, int cnt);
-	void (*detach)(struct msm_mmu *mmu, const char **names, int cnt);
+	int (*attach)(struct msm_mmu *mmu, const char * const *names, int cnt);
+	void (*detach)(struct msm_mmu *mmu, const char * const *names, int cnt);
 	int (*map)(struct msm_mmu *mmu, uint32_t iova, struct sg_table *sgt,
 			unsigned len, int prot);
 	int (*unmap)(struct msm_mmu *mmu, uint32_t iova, struct sg_table *sgt,