h5xxx: rename machine back to its original name

* renaming machines breaks overrides. In this case the kernel couldn't find its defconfig
* renaming machines breaks ipkg since existing installations don't know about the new arch
* renaming machines breaks existing distributions
So please don't rename machines without providing an upgrade path

diff --git a/conf/machine/h5000.conf b/conf/machine/h5xxx.conf
similarity index 100%
rename from conf/machine/h5000.conf
rename to conf/machine/h5xxx.conf