power: Rename CONFIG_PMIC_... to CONFIG_POWER_...

Commit be3b51aa did this mostly, but several have been added since. Do the
job again.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/arndale.h b/include/configs/arndale.h
index 515facf..30ecd45 100644
--- a/include/configs/arndale.h
+++ b/include/configs/arndale.h
@@ -224,8 +224,8 @@
 
 /* PMIC */
 #define CONFIG_PMIC
-#define CONFIG_PMIC_I2C
-#define CONFIG_PMIC_MAX77686
+#define CONFIG_POWER_I2C
+#define CONFIG_POWER_MAX77686
 
 #define CONFIG_DEFAULT_DEVICE_TREE	exynos5250-arndale