[PATCH] regulator: stub out devm_regulator_get_exclusive

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If we don't stup that call out, we will have
build failures for any drivers using that function
when .config happens to have CONFIG_REGULATOR=n.

One such case below, found with randconfig

drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c: In function ‘mdp4_kms_init’:
drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c:384:2: error: implicit declaration \
	of function ‘devm_regulator_get_exclusive’ [-Werror=implicit-function-declaration]
  mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd");
  ^
drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c:384:16: error: assignment makes \
	pointer from integer without a cast [-Werror]
  mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd");
                ^
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
 include/linux/regulator/consumer.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index d347c80..ff61f3b 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -291,6 +291,11 @@ regulator_get_optional(struct device *dev, const char *id)
 	return ERR_PTR(-ENODEV);
 }
 
+static inline struct regulator *__must_check
+devm_regulator_get_exclusive(struct device *dev, const char *id)
+{
+	return ERR_PTR(-ENODEV);
+}
 
 static inline struct regulator *__must_check
 devm_regulator_get_optional(struct device *dev, const char *id)
-- 
2.1.0.GIT

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