[PATCH] iommu/arm-smmu-v3: Include string_choices.h header for str_read_write

[AngeloGioacchino Del Regno]

The str_read_write() helper function is defined in the missing
string_choices.h header: include it to resolve build failures.

Fixes: f2c77f6e41e6 ("iommu/arm-smmu-v3: Use str_read_write helper w/ logs")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 0e4cbb2c64d7..a0e395da8a88 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -26,6 +26,7 @@
 #include <linux/pci.h>
 #include <linux/pci-ats.h>
 #include <linux/platform_device.h>
+#include <linux/string_choices.h>
 #include <kunit/visibility.h>
 #include <uapi/linux/iommufd.h>
 
-- 
2.47.0