clk: spacemit: ccu_mix: fix inverted condition in ccu_mix_trigger_fc()

Fix inverted condition that skips frequency change trigger,
causing kernel panics during cpufreq scaling.

Fixes: 1b72c59 ("clk: spacemit: Add clock support for SpacemiT K1 SoC")
Signed-off-by: Shuwei Wu <shuwei.wu@mailbox.org>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://lore.kernel.org/r/20260305-k1-clk-fix-v1-1-abca85d6e266@mailbox.org
Signed-off-by: Yixun Lan <dlan@kernel.org>

Author: WayneWu3

drivers/clk/spacemit/ccu_mix.c

@@ -73,7 +73,7 @@ static int ccu_mix_trigger_fc(struct clk_hw *hw)
 	struct ccu_common *common = hw_to_ccu_common(hw);
 	unsigned int val;
 
-	if (common->reg_fc)
+	if (!common->reg_fc)
 		return 0;
 
 	ccu_update(common, fc, common->mask_fc, common->mask_fc);