hwmon: pm8921-adc: Add sysfs interface

-Add sysfs interface to read PM8921 HK/XOADC
and thermistor temperature measurements mapped
through MPP's.
-Move PM8921 ADC from directory /drivers/mfd to
/drivers/hwmon for userspace clients to read ADC
through hwmon.

CRs-Fixed: 302365
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>

Conflicts:

	drivers/mfd/Kconfig
diff --git a/drivers/power/pm8921-bms.c b/drivers/power/pm8921-bms.c
index 79124f7..1307da4 100644
--- a/drivers/power/pm8921-bms.c
+++ b/drivers/power/pm8921-bms.c
@@ -18,7 +18,7 @@
 #include <linux/errno.h>
 #include <linux/mfd/pm8xxx/pm8921-bms.h>
 #include <linux/mfd/pm8xxx/core.h>
-#include <linux/mfd/pm8921-adc.h>
+#include <linux/mfd/pm8xxx/pm8921-adc.h>
 #include <linux/interrupt.h>
 #include <linux/bitops.h>
 #include <linux/debugfs.h>