NUCLEO_L433RC_P: fix pins definitions

[bcostm]

Description

This PR makes some corrections on pins definitions:

• corrects the LEDs
• remove A6 and A7 (don't exist on Arduino connector)
• add D14 and D15

Problem with the LED has been identified here:
https://os.mbed.com/questions/80256/Cant-compile-NUCLEO-L433RC-P-board/

Pull request type

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

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 1437
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6330/

Triggering tests

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Exporter Build : FAILURE

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Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6330/

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Test : SUCCESS

Build number : 1217
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6330/1217

[0xc0170]

/morph export-build

[bcostm]

cc @helmut64

[mbed-ci]

Exporter Build : FAILURE

Build number : 1092
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6330/

[cmonr]

Will relaunch when able to. ARM license CI issue affecting ARM builds, and it looks like one of the build machines closed uncleanly.

FYI: @studavekar

[cmonr]

/morph build

[mbed-ci]

Build : FAILURE

Build number : 1472
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6330/

[0xc0170]

/morph build

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Build : SUCCESS

Build number : 1479
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/6330/

Triggering tests

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

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Exporter Build : SUCCESS

Build number : 1124
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/6330/

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Test : FAILURE

Build number : 1261
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6330/1261

[cmonr]

/morph test

[mbed-ci]

Test : SUCCESS

Build number : 1269
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/6330/1269