msm: 9615: Add xo voting support

1. Set CXO active and sleep set votes during init time
and invoke the xo driver from the 9615 board file.

2. Enable the msm_xo driver for 9615 in the msm Kconfig

Change-Id: I3286e6f12e73b6286593037157a1a91605df7ce0
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 904839b..92d70a8 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -257,6 +257,7 @@
 	select MSM_RPM_REGULATOR
 	select MULTI_IRQ_HANDLER
 	select MSM_PM8X60 if PM
+	select MSM_XO
 
 config ARCH_MSM8625
 	bool "MSM8625"