LoRaWAN: Wrong type of message check

[hasnainvirk]

Description

In the reception data path, we needed to check the MCPS CONFIRMATION type
not the MCPS INDICATION type. Indication message type is for downlink message type
which can be UNCONFIRMED even if we have sent a CONFIRMED one, e.g., an ACK.

TARGET Fix for 5.9. Should go to master ASAP.

Pull request type

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

[hasnainvirk]

@kivaisan @kjbracey-arm @0xc0170 @cmonr. Please review.

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2002
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6892/

Triggering tests

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

[mbed-ci]

Exporter Build : SUCCESS

Build number : 1654
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6892/

[mbed-ci]

Test : SUCCESS

Build number : 1812
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6892/1812