power: regulator: qcom-rpmh-regulator: adjust headers for U-Boot

Remove unused/unsupported Linux headers and add necessary U-Boot ones.

Acked-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/power/regulator/qcom-rpmh-regulator.c b/drivers/power/regulator/qcom-rpmh-regulator.c
index 80e3047..5f522de 100644
--- a/drivers/power/regulator/qcom-rpmh-regulator.c
+++ b/drivers/power/regulator/qcom-rpmh-regulator.c
@@ -5,15 +5,12 @@
 #define pr_fmt(fmt) "%s: " fmt, __func__
 
 #include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/regulator/driver.h>
-#include <linux/regulator/machine.h>
-#include <linux/regulator/of_regulator.h>
+#include <dm/device_compat.h>
+#include <dm/device.h>
+#include <dm/devres.h>
+#include <dm/lists.h>
+#include <power/regulator.h>
+#include <log.h>
 
 #include <soc/qcom/cmd-db.h>
 #include <soc/qcom/rpmh.h>