Patch for issue #842

The SETEND instruction is a 16 bit Thumb instruction which is included
in T variants of ARMv6 and above, but is not available in M-Class cores
(see ARM Compiler toolchain Assembler Reference Ver 5.0).

To be consistent with other similar instructions its group flags have
been updated to be:

{ARM_GRP_THUMB, ARM_GRP_V6, ARM_GRP_NOTMCLASS,0}
1 file changed