RFR(xs): 8205390: jtreg: Fix failing TestRTMSpinLoopCount on PPC64

[Gustavo Romero]

Hi,

Could the following change be reviewed please?

bug   : https://bugs.openjdk.java.net/browse/JDK-8205390
webrev: http://cr.openjdk.java.net/~gromero/8205390/v1/

It adds a new throttling sequence for PPC64 because the last value on current
sequence does not fit on PPC64.

By using the new sequence the following test is fixed:

+Passed: compiler/rtm/locking/TestRTMSpinLoopCount.java
	

Thank you and best regards,
Gustavo