[PATCH] platform/surface: gpe: add missing err.h include

[Bartosz Golaszewski]

We now use PTR_ERR() and IS_ERR() in this module so pull in the header
that provides them.

Fixes: 1e0bd438b876 ("platform/surface: gpe: use platform_device_register_full()")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
---
This must go through the driver core tree as a follow up to the commit
it fixes.

 drivers/platform/surface/surface_gpe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/surface/surface_gpe.c b/drivers/platform/surface/surface_gpe.c
index 4ca7ad76f3b9d..29b264f2a444e 100644
--- a/drivers/platform/surface/surface_gpe.c
+++ b/drivers/platform/surface/surface_gpe.c
@@ -11,6 +11,7 @@
 
 #include <linux/acpi.h>
 #include <linux/dmi.h>
+#include <linux/err.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
-- 
2.47.3