sdk: fix an ./iop genconfig warning.

iopsys-brcm63xx-mips/image/Config.in

@@ -47,18 +47,16 @@ config TARGET_NO_DSL
 choice	USE_DSL
 	prompt "DSL ANNEX/mode"
 	depends on !TARGET_NO_DSL
-
-config TARGET_DSL_ANNEX_A
-	bool "Annex A"
-	default y
-
-config TARGET_DSL_ANNEX_B
-	bool "Annex B"
-	default n
-
-config TARGET_DSL_GFAST
-	bool "G.Fast"
-	default n
+	default TARGET_DSL_ANNEX_A
+
+	config TARGET_DSL_ANNEX_A
+		bool "Annex A"
+	
+	config TARGET_DSL_ANNEX_B
+		bool "Annex B"
+	
+	config TARGET_DSL_GFAST
+		bool "G.Fast"
 endchoice
 
 config TARGET_NO_VOICE