[PATCH v6 4/4] soc: qcom: ubwc: Fix missing include

When CONFIG_QCOM_UBWC_CONFIG=n, compiler needs to know the definition
of ERR_PTR otherwise there will be a compilation error:

In file included from drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp_v13.c:7:
./include/linux/soc/qcom/ubwc.h: In function ‘qcom_ubwc_config_get_data’:
./include/linux/soc/qcom/ubwc.h:45:16: error: implicit declaration of
function ‘ERR_PTR’ [-Wimplicit-function-declaration]

Fix this by including <linux/err.h>

Fixes: 1924272b9ce1 ("soc: qcom: Add UBWC config provider")
Reviewed-by: Dmitry Baryshkov <[email protected]>
Reviewed-by: Konrad Dybcio <[email protected]>
Signed-off-by: Daniel Baluta <[email protected]>
---
 include/linux/soc/qcom/ubwc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/soc/qcom/ubwc.h b/include/linux/soc/qcom/ubwc.h
index a7372d9c25fbc..f3a70360b177b 100644
--- a/include/linux/soc/qcom/ubwc.h
+++ b/include/linux/soc/qcom/ubwc.h
@@ -8,6 +8,7 @@
 #define __QCOM_UBWC_H__
 
 #include <linux/bits.h>
+#include <linux/err.h>
 #include <linux/printk.h>
 #include <linux/types.h>
 
-- 
2.45.2