iommu/qcom: Drop of_match_ptr to fix -Wunused-const-variable

The of_device_id is included unconditionally by of.h header and used
in the driver as well.  Remove of_match_ptr to fix W=1 compile test
warning with !CONFIG_OF:

    drivers/iommu/qcom_iommu.c:910:34: warning: 'qcom_iommu_of_match' defined but not used [-Wunused-const-variable=]
      910 | static const struct of_device_id qcom_iommu_of_match[] = {
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200728170859.28143-3-krzk@kernel.orgSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/arm/arm-smmu/qcom_iommu.c

@@ -752,7 +752,7 @@ static const struct of_device_id ctx_of_match[] = {
 static struct platform_driver qcom_iommu_ctx_driver = {
 	.driver	= {
 		.name		= "qcom-iommu-ctx",
-		.of_match_table	= of_match_ptr(ctx_of_match),
+		.of_match_table	= ctx_of_match,
 	},
 	.probe	= qcom_iommu_ctx_probe,
 	.remove = qcom_iommu_ctx_remove,
@@ -915,7 +915,7 @@ static const struct of_device_id qcom_iommu_of_match[] = {
 static struct platform_driver qcom_iommu_driver = {
 	.driver	= {
 		.name		= "qcom-iommu",
-		.of_match_table	= of_match_ptr(qcom_iommu_of_match),
+		.of_match_table	= qcom_iommu_of_match,
 		.pm		= &qcom_iommu_pm_ops,
 	},
 	.probe	= qcom_iommu_device_probe,