Update TF-A to support NS_TIMER_SWITCH := 1

[jforissier]

The OP-TEE function tracing (CFG_FTRACE_SUPPORT=y) needs an updated version of TF-A [1] in order for the timestamps to work, as mentioned here [2].

[1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/commit?id=43f999a7e35d
[2] OP-TEE/optee_os#3117 (comment)

[jbech-linaro]

So, do it before or after the release? Before and the current TB-tags have less "validity". As such I have no strong opinion when to do it and I guess people can live without ftrace support for ~1 week more.

[jforissier]

@jbech-linaro agreed, updating after the release is preferable IMO.

[jbech-linaro]

@jbech-linaro agreed, updating after the release is preferable IMO.

Ok, let's agree on doing that! Maybe we should have an overall "try to update git XYZ" exercise, while having a look at it. I believe most of them except buildroot would be pretty straight forward.

[jforissier]

#154