BLE fixes (SM whitelist creation, Nordic scatter file fix, missing TLS initialisation)

[paul-szczepanek-arm]

Description

Whitelist creation did not update the size making the consumer think no items where created (original PR: paul-szczepanek-arm#54).

Place observers sequentially in flash in the scatter file for Nordic (original PR: paul-szczepanek-arm#57).

Missing TLS initialisation (original PR: paul-szczepanek-arm#56).

MBED_ASSERT had the wrong condition, creating a false assert when ran in debug.

Pull request type

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

[donatieng]

This is targeting mbed OS 5.9 RC2.

One more fix on its way for #7006, please do not merge for now

[donatieng]

Actually looks like #7006 does not need further fixing, so this PR is good to go!

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2224
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7089/

Triggering tests

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

[mbed-ci]

Test : SUCCESS

Build number : 2014
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7089/2014

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1852
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7089/

[cmonr]

/morph uvisor-test

[0xc0170]

/morph uvisor-test

[0xc0170]

/morph uvisor-test

[0xc0170]

@orenc17 Please check CI uvisor for this PR