[RFA] Fix erroneous UNPREDICTABLE message with STMIA

[Nick Clifton]

Hi Matthew,

> 	* config/tc-arm.c (encode_thumb2_ldmstm): Make warning about
> 	writeback when base register is in register list an error, and
> 	correct check.
> 	(do_t_ldmstm): Change warnings.
>
> gas/testsuite/ChangeLog:
> 2010-05-13  Matthew Gretton-Dann<matthew.gretton-dann@arm.com>
> 	* gas/arm/thumb2_ldmstm.d: Add new testcases.
> 	* gas/arm/thumb2_ldmstm.s: Likeiwse.
> 	* gas/arm/thumb2_ldmstm_bad.d: Add testcases to check for
> 	UNPREDICTABLE ldm/stm.
> 	* gas/arm/thumb2_ldmstm_bad.l: Likewise.
> 	* gas/arm/thumb2_ldmstm_bad.s: Likewise.

Approved and applied.

Cheers
   Nick