nb/amd: Fix typo

Change-Id: I7d27981dd7af53f0e8484d267a9a40fd3d269212
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38001
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 1733b28..074b4b9 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -160,7 +160,7 @@
 
 /**
  * @return
- *  @retval 2  resoure does not exist, usable
+ *  @retval 2  resource does not exist, usable
  *  @retval 0  resource exists, not usable
  *  @retval 1  resource exist, resource has been allocated before
  */