msm: pil-modem: Migrate to clk APIs for XO voting

Use the clock APIs instead of the msm_xo APIs to vote on PXO.
This removes one more msm specific api from this driver and will
allow us to move XO control into the rpm clock driver.

Change-Id: Ie7d862131a7b8717c3ab0574f570f073c6a69dfd
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/arch/arm/mach-msm/clock-8x60.c b/arch/arm/mach-msm/clock-8x60.c
index 94fafda..17f5d01 100644
--- a/arch/arm/mach-msm/clock-8x60.c
+++ b/arch/arm/mach-msm/clock-8x60.c
@@ -3520,6 +3520,7 @@
 
 static struct clk_lookup msm_clocks_8x60[] = {
 	CLK_LOOKUP("cxo",		cxo_clk.c,	NULL),
+	CLK_LOOKUP("xo",		pxo_clk.c,	"pil_modem"),
 	CLK_LOOKUP("pll4",		pll4_clk.c,	"pil_qdsp6v3"),
 	CLK_LOOKUP("measure",		measure_clk.c,	"debug"),