rt2x00: Increase REGISTER_BUSY_COUNT

For some hardware the REGISTER_BUSY_COUNT isn't sufficient,
increase the REGISTER_BUSY_COUNT to 100 to catch most
devices which have more problems with accessing the registers.

For normal operating devices nothing would change as they will
exit the loop early anyway.
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Acked-by: NHelmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00.h

@@ -915,7 +915,7 @@ struct rt2x00_dev {
  * in those cases REGISTER_BUSY_COUNT attempts should be
  * taken with a REGISTER_BUSY_DELAY interval.
  */
-#define REGISTER_BUSY_COUNT	5
+#define REGISTER_BUSY_COUNT	100
 #define REGISTER_BUSY_DELAY	100
 
 /*