"Fix" the twlbg patches and make them optional

source/config.c

@@ -43,7 +43,8 @@ void configureCFW(void)
                                         "( ) Show current NAND in System Settings",
                                         "( ) Show GBA boot screen in patched AGB_FIRM",
                                         "( ) Display splash screen before payloads",
-                                        "( ) Use a PIN" };
+                                        "( ) Use a PIN",
+                                        "( ) Enable experimental TwlBg patches" };
 
     struct multiOption {
         int posXs[4];

source/firm.c

@@ -320,7 +320,7 @@ static inline void patchLegacyFirm(FirmwareType firmType)
 
     applyLegacyFirmPatches((u8 *)firm, firmType);
 
-    if(firmType == TWL_FIRM)
+    if(firmType == TWL_FIRM && CONFIG(8))
         patchTwlBg((u8 *)firm + section[1].offset);
 }