* gas/arm/vfma1.d: Only run on ELF based targets.

    * gas/arm/vfma1.d: Only run on ELF based targets.

        PR binutils/10924
        * gas/arm/arch4t-eabi.d: Update expected disassembly.
        * gas/arm/arch4t.d: Likewise.
        * gas/arm/archv6t2.d: Likewise.
        * gas/arm/arm7t.d: Likewise.
        * gas/arm/inst.d: Likewise.
        * gas/arm/xscale.d: Likewise.

        PR binutils/10924
        * arm-dis.c (arm_opcodes): Add patterns to match undefined LDRB
        instruction variants.  Add pattern for MRS variant that was being
        confused with CMP.
        (arm_decode_shift): Place error message in a comment.
        (print_insn_arm): Note that writing back to the PC is
        unpredictable.
        Only print 'p' variants of cmp/cmn/teq/tst instructions if
        decoding for pre-V6 architectures.