get rid of XFree86LOADER, XFree86Server, XFree86Module, and IN_MODULE

Get rid of almost all uses of these definitions.  They're still defined for
delinquent out-of-tree drivers, and also for the Mesa build.  As well as
for miinitext.c.  But largely gone.

hw/xfree86/common/xf86str.h

@@ -319,7 +319,6 @@ typedef struct _DriverRec {
 #define HaveDriverFuncs 1
 
 
-#ifdef XFree86LOADER
 /*
  * The optional module list struct. This allows modules exporting helping
  * functions to configuration tools, the Xserver, or any other
@@ -333,7 +332,6 @@ typedef struct _ModuleInfoRec {
     const OptionInfoRec * (*AvailableOptions)(void *unused);
     pointer		unused[8];	/* leave some space for more fields */
 } ModuleInfoRec, *ModuleInfoPtr;
-#endif
 
 /*
  * These are the private bus types.  New types can be added here.  Types