SWO support for LPC4322 and other enhancements

[mbrossard]

This is a refresh of #813 from @groleo with:

• Added SWO support
• Updated startup / system
• Improved GPIO
• Increase core frequency to 120 Mhz

Also thanks to @kc8apf who did another SWO effort and pointed out that the latest CMSIS UART drivers did not work.

[groleo]

@mbrossard
what problems does the previous UART have?
I think it'd help mentioning in the downgrade commit message; asking because I do see some corruptions when I use write u32 to the ITM port.

[mbrossard]

The CMSIS UART drivers in NXP.LPC4300_DFP.v2.9.0 CMSIS pack work, when the ones in NXP.LPC4300_DFP.v2.10.0 generate a HardFault, I have not had the time to investigate further. [04f20c3] and [6c2ce0f] commit messages mention pack versions.

The SWO tests I do are currently very simple: lpcxpresso55s69_hello_world_swo from MCUXpresso with pyocd at 1Mbaud. I need to create a better test program (daplink-validation only tests UART).

I have picked up your commit for MIMXRT1170-EVK on top of this PR but I can't test it without the hardware. I am looking into adding support for MIMXRT1060-EVK target to be able to test.

[groleo]

@mbrossard
Got it.
let me know if you need help on 1060