mesa: Remove target parameter from dd_function_table::MapBuffer

No driver used that parameter, and most drivers ended up with a bunch
of unused-parameter warnings because it was there.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c
index 08faf9e..507d0ce 100644
--- a/src/mesa/main/api_validate.c
+++ b/src/mesa/main/api_validate.c
@@ -65,8 +65,7 @@
 
    if (_mesa_is_bufferobj(elementBuf)) {
       /* elements are in a user-defined buffer object.  need to map it */
-      map = ctx->Driver.MapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER,
-                                  GL_READ_ONLY, elementBuf);
+      map = ctx->Driver.MapBuffer(ctx, GL_READ_ONLY, elementBuf);
       /* Actual address is the sum of pointers */
       indices = (const GLvoid *) ADD_POINTERS(map, (const GLubyte *) indices);
    }