AGESA fam15: Use local bus_isa storage

Do not use a global as the value gets discarded anyway.

Change-Id: I86aac304e073f0d74b011548d079e139891ec140
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6329
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/supermicro/h8qgi/mptable.c b/src/mainboard/supermicro/h8qgi/mptable.c
index 8b36bc7..8a248cc 100644
--- a/src/mainboard/supermicro/h8qgi/mptable.c
+++ b/src/mainboard/supermicro/h8qgi/mptable.c
@@ -32,12 +32,11 @@
 extern u8 bus_sp5100[2];
 extern u32 sbdn_sr5650;
 extern u32 sbdn_sp5100;
-extern int bus_isa;
-
 
 static void *smp_write_config_table(void *v)
 {
 	struct mp_config_table *mc;
+	int bus_isa;
 	u32 apicid_sp5100;
 	u32 apicid_sr5650;
 	device_t dev;
diff --git a/src/mainboard/supermicro/h8scm/mptable.c b/src/mainboard/supermicro/h8scm/mptable.c
index 8b36bc7..8a248cc 100644
--- a/src/mainboard/supermicro/h8scm/mptable.c
+++ b/src/mainboard/supermicro/h8scm/mptable.c
@@ -32,12 +32,11 @@
 extern u8 bus_sp5100[2];
 extern u32 sbdn_sr5650;
 extern u32 sbdn_sp5100;
-extern int bus_isa;
-
 
 static void *smp_write_config_table(void *v)
 {
 	struct mp_config_table *mc;
+	int bus_isa;
 	u32 apicid_sp5100;
 	u32 apicid_sr5650;
 	device_t dev;
diff --git a/src/mainboard/tyan/s8226/mptable.c b/src/mainboard/tyan/s8226/mptable.c
index 8b36bc7..8a248cc 100644
--- a/src/mainboard/tyan/s8226/mptable.c
+++ b/src/mainboard/tyan/s8226/mptable.c
@@ -32,12 +32,11 @@
 extern u8 bus_sp5100[2];
 extern u32 sbdn_sr5650;
 extern u32 sbdn_sp5100;
-extern int bus_isa;
-
 
 static void *smp_write_config_table(void *v)
 {
 	struct mp_config_table *mc;
+	int bus_isa;
 	u32 apicid_sp5100;
 	u32 apicid_sr5650;
 	device_t dev;