clk: meson: a1: Staticize rtc clk

Sparse rightly complains that this symbol is supposed to be static.

Cc: Jian Hu <[email protected]>
Cc: Dmitry Rokosov <[email protected]>
Cc: Martin Blumenstingl <[email protected]>
Cc: Jerome Brunet <[email protected]>
Fixes: 84af914 ("clk: meson: a1: add Amlogic A1 Peripherals clock controller driver")
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Jerome Brunet <[email protected]>
Reviewed-by: Martin Blumenstingl <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

Author: bebarino

drivers/clk/meson/a1-peripherals.c

@@ -218,7 +218,7 @@ static struct clk_regmap rtc_32k_sel = {
 	},
 };
 
-struct clk_regmap rtc = {
+static struct clk_regmap rtc = {
 	.data = &(struct clk_regmap_gate_data){
 		.offset = RTC_BY_OSCIN_CTRL0,
 		.bit_idx = 30,