regulator: tps6594-regulator: Remove unneeded semicolon

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.

Signed-off-by: Chen Ni <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/tps6594-regulator.c

···
 	default:
 		dev_err(tps->dev, "unknown chip_id %lu\n", tps->chip_id);
 		return -EINVAL;
-	};
+	}
 
 	enum {
 		MULTI_BUCK12,