Failures on Fedora-ppc64be-native-extended-gdbserver-m64, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	fedora-ppc64be-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Fedora-ppc64be-native-extended-gdbserver-m64/builds/5261>

Commit(s) tested:
	4ac4bb6ad5ead16be5ca6996a3e325c26ddf71da

Author(s) (in the same order as the commits):
	Simon Marchi <simon.marchi@polymtl.ca>

Subject:
	arm-linux-nat.c: Use ptid from regcache instead of inferior_ptid

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Fedora-ppc64be-native-extended-gdbserver-m64/4a/4ac4bb6ad5ead16be5ca6996a3e325c26ddf71da/>