PATCH [1/10] arm: add 'bti' instruction for Armv8.1-M pacbti extension

[Nick Clifton]

Hi Andrea,

> The series was tested and does not introduce regressions.

I found one regression with this series applied:

   GAS REGRESSION: Valid Armv8.1-M pointer authentication and branch target identification extention

Admittedly this was with a toolchain configure for "arm-wince-pe", but still
please could you add an exception for PE format targets to this test.

The patch series (with that change) is approved - please apply.

Cheers
   Nick