[RFC ARM] Revert turning off of flag_dwarf2_cfi_asm for the ARM port.

[Richard Earnshaw]

> 
> Now that the fix for PR40521 has been committed on trunk, my workaround
> that was committed earlier this year is no longer required. Ok to
> revert this change for the ARM port after a round of regression testing
> ? Given that this fix was backported to 4.4 branch is it ok to revert
> this change on the 4.4 branch as well ?
> 
> I know that the Ubuntu 4.4 tree reverts this workaround and has the
> appropriate backport in. Thanks to Matthias for pointing this out to
> me.
> 
> cheers
> Ramana
> 
> 
> 2009-12-11  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
> 
>         Revert
>         2009-10-05  Ramana Radhakrishnan
> <ramana.radhakrishnan@arm.com>
>         * config/arm/arm.c (arm_override_options): Really initialize
>         flag_dwarf2_cfi_asm to 0.
>         2009-10-01  Ramana Radhakrishnan
> <ramana.radhakrishnan@arm.com>
> 
>                 * config/arm/arm.c (arm_override_options): Turn off
>                 flag_dwarf2_cfi_asm for AAPCS variants.
> 

OK for trunk.  I think we should let it gestate there for a few days before
backporting to the release branch just in case there are some odd issues
thrown up.

R.