Fix Wiznet: IAR heap memory problem

[khj098765]

Fix Bug : IAR heap memory problem

Description

heap memory problems fixed in IAR.

Tested locally with WIZWIKI_W7500 targets and IAR toolchains.

You can see test results here

Pull request type

[x] Fix
[ ] Refactor
[ ] New Target
[ ] Feature

[khj098765]

Hi @andrewc-arm @aashishc1988
I fixed #7710 issue... close please...

[0xc0170]

This shall follow, #7238 . Thus stack should be 1k in this case. Should be all good still , please change

[khj098765]

Thank you @0xc0170
I fixed the stack size with reference to # 7238.
Please let me know if you have any changes.

[aashishc1988]

@khj098765 Verified that it fixes #7710

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 3094
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7921/

Triggering tests

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

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2703
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7921/

[mbed-ci]

Test : SUCCESS

Build number : 2883
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7921/2883

[0xc0170]

/morph mbed2-build

[mbed-ci]

Exporter Build : FAILURE

Build number : 2724
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7921/