amdfam10 boards: Drop extern on bus_rs780 and sbdn_rs780

Change-Id: I7dc943f3376e9b706d3d486231525df85f806858
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30631
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/advansus/a785e-i/mptable.c

@@ -20,10 +20,8 @@
 #include <stdint.h>
 #include <cpu/amd/amdfam10_sysconf.h>
 
-extern u8 bus_rs780[11];
 extern u8 bus_sb800[6];
 extern u32 apicid_sb800;
-extern u32 sbdn_rs780;
 extern u32 sbdn_sb800;
 
 u8 intr_data[] = {