randr: unexport and document RRProviderCreate()

Not used by any external drivers, so no need to keep it exported.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

randr/randrstr.h

@@ -675,10 +675,6 @@ RRConfigureOutputProperty(RROutputPtr output, Atom property,
 /* rrprovider.c */
 #define PRIME_SYNC_PROP         "PRIME Synchronization"
 
-extern _X_EXPORT RRProviderPtr
-RRProviderCreate(ScreenPtr pScreen, const char *name,
-                 int nameLength);
-
 extern _X_EXPORT void
 RRProviderDestroy (RRProviderPtr provider);
 

randr/randrstr_priv.h

@@ -390,4 +390,15 @@ Bool RRProviderInit(void);
  */
 void RRProviderInitErrorValue(void);
 
+/*
+ * Create / allocate new provider structure
+ *
+ * @param pScreen the screen the provider belongs to
+ * @param name    name of the provider (counted string)
+ * @param nameLen size of the provider name
+ * @return new provider structure, or NULL on failure
+ */
+RRProviderPtr RRProviderCreate(ScreenPtr pScreen, const char *name,
+                               int nameLen);
+
 #endif /* _XSERVER_RANDRSTR_PRIV_H_ */