Fix config value

Explicitly setting values to =n seems to cause issues with Open-Suse
packaging. So use the (probably proper) "is not set" format instead.

configs/surface-6.1.config

@@ -2,7 +2,7 @@
 # Surface Aggregator Module
 #
 CONFIG_SURFACE_AGGREGATOR=m
-CONFIG_SURFACE_AGGREGATOR_ERROR_INJECTION=n
+# CONFIG_SURFACE_AGGREGATOR_ERROR_INJECTION is not set
 CONFIG_SURFACE_AGGREGATOR_BUS=y
 CONFIG_SURFACE_AGGREGATOR_CDEV=m
 CONFIG_SURFACE_AGGREGATOR_HUB=m