soc/intel/meteorlake: Fix set but unused variable

Clang complains about this.

Change-Id: Ibe1de3057c17b4aa8ecbd87fac598e43294584e3
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66264
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/meteorlake/systemagent.c

@@ -83,6 +83,8 @@ void soc_systemagent_init(struct device *dev)
 		return;
 	}
 
+	/* Remove once commented line below is enabled */
+	(void)soc_config;
 	/* UPDATEME: Need to enable later */
 	//set_power_limits(MOBILE_SKU_PL1_TIME_SEC, soc_config);
 }