* gas/arm/arch7.s: Fix typo basepri_max should be basepri_mask.
* gas/arm/mrs-msr-thumb-v7e-m.s: Likewise.
* gas/arm/arch7.d: Update expected disassembly.
* gas/arm/attr-march-armv7.d: Remove Microcontroller tag.
* gas/arm/blx-bad.d: Only run for ELF based targets.
* gas/arm/mrs-msr-thumb-v6t2.d: Likewise.
* gas/arm/vldm-arm.d: Likewise.
* gas/arm/mrs-msr-thumb-v7-m.d: Likewise.
Remove qualifiers from PSR and IAPSR regsiter names.
* gas/arm/mrs-msr-thumb-v7e-m.d: Likewise.
* gas/arm/thumb2_bcond.d: Update expected disassembly to allow for
relaxing of branch insns.
* gas/arm/thumb32.d: Fix whitespace problems in disassembly.
* config/tc-arm.c (parse_psr): Use selected_cpu not cpu_variant to
detect M-profile targets.
(do_t_swi): Exclude v7 and higher variants from arm_ext_os test.
(v7m_psrs): Fix typo: basepri_max should be basepri_mask.
* arm-dis.c (psr_name): Revert previous delta.
* arm.h (ARM_AEXT_V7_ARM): Remove ARM_EXT_OS from bitmask.