soc/intel: Use config_of()

Change-Id: I0727a6b327410197cf32f598d1312737744386b3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34328
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: David Guckian

src/soc/intel/icelake/memmap.c

@@ -166,7 +166,7 @@ static size_t calculate_reserved_mem_size(uintptr_t dram_base,
 	size_t reserve_mem_size;
 	const struct soc_intel_icelake_config *config;
 
-	config = dev->chip_info;
+	config = config_of(dev);
 
 	/* Get PRMRR size */
 	reserve_mem_base -= get_prmrr_size(reserve_mem_base, config);