Add code style check

[ronald-cron-arm]

Add code style check

• [] Adapt code_style.py to work both for mbedtls and TF-PSA-Crypto repo. Keep check of all files when called in the context of mbedtls for the time being.
• [] Add tf_psa_crypto_check_code_style component in tf-psa-crypto/tests/scripts/components-basic-checks.sh (to be created).

Depends on: Mbed-TLS/mbedtls#9720 and #50 (code_style.py parses check-generated-files.sh).

DOD: Same support for code style checking in TF-PSA-Crypto as in mbedtls

[Harry-Ramsey]

Upon investigation, this task just requires check-generated-files.sh to be moved to framework/scripts. It does report numerous code issues however for TF-PSA-Crypto which will need to be fixed or the code style may need to be adjusted for TF-PSA-Crypto.

Currently an if statement like this is invalid:

if (ret != 0)
    return P256_INVALID_PRIVKEY;

and needs to be replaced with

if (ret != 0) {
    return P256_INVALID_PRIVKEY;
}