ASoC: cs35l45: Fix "Dead assigment" warning

Value stored to 'ret' is never read. Remove it.

Signed-off-by: Vlad Karpovich <vkarpovi@opensource.cirrus.com
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230828170525.335671-2-vkarpovi@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org

sound/soc/codecs/cs35l45.c

@@ -969,7 +969,7 @@ static irqreturn_t cs35l45_dsp_virt2_mbox_cb(int irq, void *data)
 
 	ret = regmap_read(cs35l45->regmap, CS35L45_DSP_VIRT2_MBOX_3, &mbox_val);
 	if (!ret && mbox_val)
-		ret = cs35l45_dsp_virt2_mbox3_irq_handle(cs35l45, mbox_val & CS35L45_MBOX3_CMD_MASK,
+		cs35l45_dsp_virt2_mbox3_irq_handle(cs35l45, mbox_val & CS35L45_MBOX3_CMD_MASK,
 				(mbox_val & CS35L45_MBOX3_DATA_MASK) >> CS35L45_MBOX3_DATA_SHIFT);
 
 	/* Handle DSP trace log IRQ */