staging: sm750fb: correct function return

hw_cursor_setData2() is a function with void return type but it was
returning an integer.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/sm750_cursor.c

@@ -248,6 +248,4 @@ void hw_cursor_setData2(struct lynx_cursor * cursor,
 		}
 
 	}
-	return 0;
-
 }