Duplicated unit mask values without "extra" field are not working

Hi, Andi,
Maybe this is user error since I don't normally deal much with unit masks.  But on this Sandybridge system I'm
working on (mentioned in an earlier posting today), I can't get certain events/unit mask combinations to
work.  For example:

	'ophelp --extra-mask uops_issued:2000000:stall_cycles'
correctly returns '25165824'.  But

	'ophelp --extra-mask uops_issued:2000000:any'
or
	'ophelp --extra-mask uops_issued:2000000:0x1'
returns:
	Named unit masks not allowed for events without 'extra:' values.
	Please specify the numerical value for the unit mask. See 'opcontrol' man page for more info.

I've found that if I hack the "any" value for uops_issued in i386/sandybridge/unit_masks with some bogus
"extra" field, then 'ophelp --extra-mask uops_issued:2000000:any' returns without a failure. Of
course that's not a proper fix.  Is this a bug or luser error?

Thanks.
-Maynard

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