nb/amd: Deduplicate nb_common.h

Save for the IO_APIC2_ADDR definition, they are equivalent.

Change-Id: I14da3d9aeefcc725428957ce0c9ac164eabacec6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47408
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 2d5234d..e345b50 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -18,7 +18,7 @@
 #include <Porting.h>
 #include <Options.h>
 #include <Topology.h>
-#include <northbridge/amd/agesa/nb_common.h>
+#include <northbridge/amd/nb_common.h>
 #include <northbridge/amd/agesa/state_machine.h>
 #include <northbridge/amd/agesa/agesa_helper.h>