mfd: intel_soc_pmic: Crystal Cove support

This patch provides chip-specific support for Crystal Cove. Crystal
Cove is the PMIC in Baytrail-T platform.

Also adds Intel SoC PMIC support to the build files.

Signed-off-by: Yang, Bin <bin.yang@intel.com>
Signed-off-by: Zhu, Lejun <lejun.zhu@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ee8204c..cd173a7 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -253,6 +253,18 @@
 	  LPC bridge function of the Intel SCH provides support for
 	  System Management Bus and General Purpose I/O.
 
+config INTEL_SOC_PMIC
+	bool "Support for Intel Atom SoC PMIC"
+	depends on I2C=y
+	select MFD_CORE
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	help
+	  Select this option to enable support for the PMIC device
+	  on some Intel SoC systems. The PMIC provides ADC, GPIO,
+	  thermal, charger and related power management functions
+	  on these systems.
+
 config MFD_INTEL_MSIC
 	bool "Intel MSIC"
 	depends on INTEL_SCU_IPC