Add support for LPC4357/53/37/33 MCUs

[cocus]

Hi!
I happen to have a board which has an LPC4337 that I never really used because vanilla NXP tools are not that great.
I would like to have PlatformIO support for it. I could help debugging the code and such, but I'm not familiar with NXP codebase (I only used STM, Freescale and ESP, but not the LPC stuff from NXP).
This is the NXP website for this line of MCUs: https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpc4300-cortex-m4-m0/32-bit-arm-cortex-m4-m0-mcu-up-to-1-mb-flash-and-136-kb-sram-ethernet-two-high-speed-usb-lcd-emc:LPC4337FET256
I think it would be possible to use the LPCOpen stuff (https://www.nxp.com/design/microcontrollers-developer-resources/lpcopen-libraries-and-examples/lpcopen-software-development-platform-lpc43xx:LPCOPEN-SOFTWARE-FOR-LPC43XX), not sure if this is already used by PlatformIO on the other LPC targets.