[PATCH] hwrng: xgene: Add explicit io.h include

[Rob Herring]

Commit 0788257aeebe ("hwrng: Explicitly include correct DT includes")
removed an implicit include of io.h. On most architectures, there's
still an implicit include of it, but not on s390. Enabling COMPILE_TEST
in commit 1ce1cd8208ad ("hwrng: Enable COMPILE_TEST for more drivers")
exposed this.

Fixes: 0788257aeebe ("hwrng: Explicitly include correct DT includes")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202308042049.8R2tNRoo-lkp@xxxxxxxxx/
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
 drivers/char/hw_random/xgene-rng.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hw_random/xgene-rng.c b/drivers/char/hw_random/xgene-rng.c
index c25bb169563d..99f4e86ac3e9 100644
--- a/drivers/char/hw_random/xgene-rng.c
+++ b/drivers/char/hw_random/xgene-rng.c
@@ -14,6 +14,7 @@
 #include <linux/hw_random.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
-- 
2.40.1