msm: clock-copper: Add cxo clock lookup entry for PIL Pronto

The PIL Pronto driver needs to vote for cxo clock. Add this clock
lookup entry in this patch.

Change-Id: Ia9cce4b885ae3a0d9d24fe5cc7058c4fce27cd5e
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>
diff --git a/arch/arm/mach-msm/clock-copper.c b/arch/arm/mach-msm/clock-copper.c
index 7812321..896806d 100644
--- a/arch/arm/mach-msm/clock-copper.c
+++ b/arch/arm/mach-msm/clock-copper.c
@@ -4716,6 +4716,7 @@
 static struct clk_lookup msm_clocks_copper[] = {
 	CLK_LOOKUP("xo",	cxo_clk_src.c,	"msm_otg"),
 	CLK_LOOKUP("xo",	cxo_clk_src.c,	"pil-q6v5-lpass"),
+	CLK_LOOKUP("xo",	cxo_clk_src.c,	"pil_pronto"),
 	CLK_LOOKUP("measure",	measure_clk.c,	"debug"),
 
 	CLK_LOOKUP("dma_bam_pclk", gcc_bam_dma_ahb_clk.c, "msm_sps"),