clk/ti/adpll: Make const pointer error a static const array

Make const pointer error a static const array, removes a dereference
and shrinks object code a little.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211127173036.150535-1-colin.i.king@gmail.com
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/ti/adpll.c

@@ -807,7 +807,7 @@ static int ti_adpll_init_registers(struct ti_adpll_data *d)
 
 static int ti_adpll_init_inputs(struct ti_adpll_data *d)
 {
-	const char *error = "need at least %i inputs";
+	static const char error[] = "need at least %i inputs";
 	struct clk *clock;
 	int nr_inputs;