kmp204x: enable the errata command

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
diff --git a/include/configs/km/kmp204x-common.h b/include/configs/km/kmp204x-common.h
index e4c5e7b..efd9635 100644
--- a/include/configs/km/kmp204x-common.h
+++ b/include/configs/km/kmp204x-common.h
@@ -381,6 +381,7 @@
  */
 #define CONFIG_CMD_PCI
 #define CONFIG_CMD_NET
+#define CONFIG_CMD_ERRATA
 
 /* we don't need flash support */
 #define CONFIG_SYS_NO_FLASH