sb/intel/i82801gx: Constify struct southbridge_intel_i82801gx_config

Change-Id: Ia5af84782d41a007be04c3dccc291b788ddfddfd
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40773
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/i82801gx/sata.c b/src/southbridge/intel/i82801gx/sata.c
index c98a645..6efdef7 100644
--- a/src/southbridge/intel/i82801gx/sata.c
+++ b/src/southbridge/intel/i82801gx/sata.c
@@ -9,8 +9,6 @@
 #include "i82801gx.h"
 #include "sata.h"
 
-typedef struct southbridge_intel_i82801gx_config config_t;
-
 static u8 get_ich7_sata_ports(void)
 {
 	struct device *lpc;
@@ -77,7 +75,7 @@
 	u8 ports;
 
 	/* Get the chip configuration */
-	config_t *config = dev->chip_info;
+	const struct southbridge_intel_i82801gx_config *config = dev->chip_info;
 
 	printk(BIOS_DEBUG, "i82801gx_sata: initializing...\n");