soc/amd/stoneyridge/southbridge: replace southbridge prefix with fch

This aligns the function names with Picasso and Cezanne. Also move the
fch_* functions in the header file in the order they get called.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I49db8021edae5e537f043bf52eea1be54dc46eca
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50124
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/stoneyridge/chip.c b/src/soc/amd/stoneyridge/chip.c
index 1282f39..91b04c5 100644
--- a/src/soc/amd/stoneyridge/chip.c
+++ b/src/soc/amd/stoneyridge/chip.c
@@ -118,13 +118,13 @@
 
 static void soc_init(void *chip_info)
 {
-	southbridge_init(chip_info);
+	fch_init(chip_info);
 	setup_bsp_ramtop();
 }
 
 static void soc_final(void *chip_info)
 {
-	southbridge_final(chip_info);
+	fch_final(chip_info);
 	fam15_finalize(chip_info);
 }