Add new target USI WM-BN-BM-22

[ashok-rao]

Description

Adding USI WM-BN-BM22 (MTB) as a new target.

Pull request type

[ ] Fix
[ ] Refactor
[X] New target
[ ] Feature
[ ] Breaking change

GT logs are attached below. From the logs:

1. RTC is timing out on GCC and IAR and
2. There are lp_timer / lp_ticker timing out on ARMCC similar to that reported here: Add support for target MTB_ADV_WISE_1530. #6423 (comment) . Please note that these 2 modules are using the exact same CPU.

GT_Log_ARMCC.txt
GT_Log_GCC.txt
GT_Log_IAR.txt

@0xc0170 @cmonr .. could you please review? Thanks.

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 1643
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6511/

Triggering tests

/morph test
/morph uvisor-test
/morph export-build
/morph mbed2-build

[0xc0170]

Looking at the test results and issues there. Should lp ticker and rtc be disabled as part of this addition and reenabled once fixed?

[ashok-rao]

Thanks @0xc0170 ..this may have to fixed from the MCU implementation side for both this and the #6423 as both use the same MCU.. I can remove those 2 features from targets.json for this module.. and need to add back once fixed..
I'll push the changes to targets.json soon.

[0xc0170]

@ashok-rao If this is affecting some other MCU, please create a new PR for this disabling (this would stay as it is and would just be rebased to include the inclusion).

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1275
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6511/

[mbed-ci]

Test : SUCCESS

Build number : 1432
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6511/1432

[0xc0170]

@ashok-rao Is this ready? I haven't seen the PR disabling features that are failing (report with failures) ?

[0xc0170]

@ashok-rao Lets discuss the issues you saw with the parent target