mfd: Add Qualcomm PMIC 8921 core driver

Add support for the Qualcomm PM8921 PMIC chip. The core driver
will communicate with the PMIC chip via the MSM SSBI bus.

Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 24aa444..d32a7b8 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -91,3 +91,4 @@
 obj-$(CONFIG_MFD_WL1273_CORE)	+= wl1273-core.o
 obj-$(CONFIG_MFD_CS5535)	+= cs5535-mfd.o
 obj-$(CONFIG_MFD_OMAP_USB_HOST)	+= omap-usb-host.o
+obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o