[PATCH, GAS/ARM] Fix selected_cpu with default CPU and -mcpu

[Nick Clifton]

Hi Richard,

>>> Old tests that failed, that have disappeared: (Eeek!)
>>
>> Wow!  Maybe somebody at ARM (hint hint) would like to go through
>> these tests and add a missing -mcpu or -march option ?

> No, they're supposed to test autodetection.  Autodetection doesn't work
> when there's a default CPU.  You can't really fix the tests for that.

Would it be possible to create a proc that checks to see if autodetection
is working (or not needed because DEFAULT_CPU has been specified), and 
skip the failing tests if it is not ?

Cheers
  Nick