Update common Cypress libraries

[morser499]

Description (required)

Updated Serial Flash interface & Network buffer classes to avoid warnings and improve robustness. Fixed issue with mbed_overrides trying to use an old implementation of cy_serial_flash_init() function.

Summary of change (What the change is for and why)

Updated Serial Flash interface & Network buffer classes to avoid warnings and improve robustness. Fixed issue with mbed_overrides trying to use an old implementation of cy_serial_flash_init() function.

Documentation (Details of any document updates required)

None

Pull request type (required)

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

---

Test results (required)

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

---

Reviewers (optional)

---

Release Notes (required for feature/major PRs)

Summary of changes

Impact of changes

Migration actions required

[ciarmcom]

@morser499, thank you for your changes.
@maclobdell @ARMmbed/mbed-os-maintainers please review.

[0xc0170]

Changes look fine to me but the commit msg does not reflect what is written here. Can you amend there: "Updated Serial Flash interface & Network buffer classes to avoid warnings and improve robustness. Fixed issue with mbed_overrides trying to use an old implementation of cy_serial_flash_init() function." as the second paragraph ?

[morser499]

Changes look fine to me but the commit msg does not reflect what is written here. Can you amend there: "Updated Serial Flash interface & Network buffer classes to avoid warnings and improve robustness. Fixed issue with mbed_overrides trying to use an old implementation of cy_serial_flash_init() function." as the second paragraph ?

Updated commit message to include additional details.

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts