clk: meson: meson8b: remove spinlock

The spinlock in meson8b clock controller is now only protecting a call to
regmap_update_bits().

The regmap API already has its own locking system so this spinlock
is redundant. Remove it.

Reviewed-by: Martin Blumenstingl <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
[jbrunet: amended to remove unused variable as reported by lkp]
Signed-off-by: Jerome Brunet <[e-mail]>

drivers/clk/meson/meson8b.c

···
 #include <dt-bindings/clock/meson8b-clkc.h>
 #include <dt-bindings/reset/amlogic,meson8b-clkc-reset.h>
 
-static DEFINE_SPINLOCK(meson_clk_lock);
-
 struct meson8b_clk_reset {
 	struct reset_controller_dev reset;
 	struct regmap *regmap;
···
 		container_of(rcdev, struct meson8b_clk_reset, reset);
 	const struct meson8b_clk_reset_line *reset;
 	unsigned int value = 0;
-	unsigned long flags;
 
 	if (id >= ARRAY_SIZE(meson8b_clk_reset_bits))
 		return -EINVAL;
···
 	if (assert != reset->active_low)
 		value = BIT(reset->bit_idx);
 
-	spin_lock_irqsave(&meson_clk_lock, flags);
-
 	regmap_update_bits(meson8b_clk_reset->regmap, reset->reg,
 			   BIT(reset->bit_idx), value);
-
-	spin_unlock_irqrestore(&meson_clk_lock, flags);
 
 	return 0;
 }