clk: qcom: ipq8074: make pcie0_rchng_clk_src static

This addresses the following sparse warning:

drivers/clk/qcom/gcc-ipq8074.c:4325:17: warning: symbol
'pcie0_rchng_clk_src' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200921142750.875142-1-yanaijie@huawei.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/qcom/gcc-ipq8074.c

@@ -4322,7 +4322,7 @@ static const struct freq_tbl ftbl_pcie_rchng_clk_src[] = {
 	{ }
 };
 
-struct clk_rcg2 pcie0_rchng_clk_src = {
+static struct clk_rcg2 pcie0_rchng_clk_src = {
 	.cmd_rcgr = 0x75070,
 	.freq_tbl = ftbl_pcie_rchng_clk_src,
 	.hid_width = 5,