iommu/arm-smmu-v3: Use str_read_write helper w/ logs

Adopt the `str_read_write` helper in event logging as suggested by the
coccinelle tool.

Signed-off-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/all/20250107130053.GC6991@willie-the-truck/
Link: https://lore.kernel.org/r/20250107165100.1093357-1-praan@google.com
Signed-off-by: Will Deacon <will@kernel.org>

Author: pran005

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

@@ -1907,7 +1907,7 @@ static void arm_smmu_dump_event(struct arm_smmu_device *smmu, u64 *raw,
 		dev_err(smmu->dev, "%s %s %s %s \"%s\"%s%s stag: %#x",
 			evt->privileged ? "priv" : "unpriv",
 			evt->instruction ? "inst" : "data",
-			evt->read ? "read" : "write",
+			str_read_write(evt->read),
 			evt->s2 ? "s2" : "s1", event_class_str[evt->class],
 			evt->class_tt ? (evt->ttrnw ? " ttd_read" : " ttd_write") : "",
 			evt->stall ? " stall" : "", evt->stag);