clk: vt8500: Staticize vtwm_pll_ops

'vtwm_pll_ops' is local to this file. Make it static.

Signed-off-by: Sachin Kamat <[e-mail]>
Cc: Tony Prisk <[e-mail]>
Signed-off-by: Mike Turquette <[e-mail]>

drivers/clk/clk-vt8500.c

···
 	return pll_freq;
 }
 
-const struct clk_ops vtwm_pll_ops = {
+static const struct clk_ops vtwm_pll_ops = {
 	.round_rate = vtwm_pll_round_rate,
 	.set_rate = vtwm_pll_set_rate,
 	.recalc_rate = vtwm_pll_recalc_rate,