mfd: intel_soc_pmic_bxtwc: Rename header to follow c-file

For better understanding of relationship between headers and modules
rename:
	intel_bxtwc.h -> intel_soc_pmic_bxtwc.h

While here, remove file name from the file itself.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/intel_soc_pmic_bxtwc.c

@@ -20,8 +20,8 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mfd/core.h>
-#include <linux/mfd/intel_bxtwc.h>
 #include <linux/mfd/intel_soc_pmic.h>
+#include <linux/mfd/intel_soc_pmic_bxtwc.h>
 #include <asm/intel_pmc_ipc.h>
 
 /* PMIC device registers */

include/linux/mfd/intel_bxtwc.h → include/linux/mfd/intel_soc_pmic_bxtwc.h

 /*
- * intel_bxtwc.h - Header file for Intel Broxton Whiskey Cove PMIC
+ * Header file for Intel Broxton Whiskey Cove PMIC
  *
  * Copyright (C) 2015 Intel Corporation. All rights reserved.
  *