clk: qcom: lcc-msm8960: change pxo_parent_data to static

The pxo_parent_data inroduced in commit bac4675a ("clk: qcom:
drop lcc-mdm9615 in favour of lcc-msm8960") is only used in lcc-msm8960.c
now, change it to static.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230803082125.521849-1-yangyingliang@huawei.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/clk/qcom/lcc-msm8960.c

@@ -23,7 +23,7 @@
 #include "clk-regmap-divider.h"
 #include "clk-regmap-mux.h"
 
-struct clk_parent_data pxo_parent_data = {
+static struct clk_parent_data pxo_parent_data = {
 	.fw_name = "pxo", .name = "pxo_board",
 };