2022q3 release

This release covers everything from 2022-07-01 and has been tested with avr-gcc
v10.2.0 from Upstream and arm-none-eabi-gcc 10.3-2022.07 from Arm.

Breaking changes:

• Uart peripheral renamed to Usart on SAMG5 devices for consistency.
• GCLK peripheral has been refactored for all SAM devices.

Features:

• RP2040 external flash size option.
• RP2040 ADC driver.
• Resolution configuration for DS18B20 driver.
• Use GPIO signal to configure STM32 Timers.
• Support for SAMx5x and SAMx7x devices.

Integrated Projects:

• printf upgraded to v6.0.0.
• LVGL upgraded to v8.3.2.
• ETL upgraded to v20.34.0.
• Pico-SDK upgraded to v1.4.0.
• STM32G0 headers upgraded to v1.4.2.
• STM32F7 headers upgraded to v1.2.8.

Fixes:

• SpiMaster compilation with GCC11.
• Using RTT with multiple channels.
• Relocation of lbuild outpath in modm:build:make module.
• Deadlock RP2040 DMA driver due to counter overflow.
• Fix compilation of moving average for floating-point type.
• SAMD setInput(InputType) does not always reset to floating anymore.

New development boards:

• Feather-RP2040 as modm:board:feather-rp2040.
• ThingPlus-RP2040 as modm:board:thingplus-rp2040.
• SAMV71 Xplained Ultra as modm:board:samv71-xplained-ultra.
• SAME54 Xplained Pro as modm:board:same54-xplained-pro.
• SAMD21 Xplained Pro as modm:board:samd21-xplained-pro.

New device drivers:

• ADS7828 ADC as modm:driver:ads7828.
• MCP9902/3/4 temperature sensor as modm:driver:mcp990x.
• ST7789 display driver as modm:driver:st7789.

Known bugs:

• C++20 is not fully implemented by GCC10 yet, however modm does not use all
  features yet anyways. See #326.
• STM32F7: D-Cache not enabled by default. See #485.
• lbuild build and lbuild clean do not remove all previously generated files
  when the configuration changes. See #285.
• Generating modm on Windows creates paths with \ that are not compatible with
  Unix. See #310.
• arm-none-eabi-gdb TUI and GDBGUI interfaces are not supported on Windows.
  See #591.

Many thanks to all our contributors.
A special shoutout to first timers 🎉:

• Artiom (@Artiom9) 🎉
• Christopher Durand (@chris-durand)
• Jonas Kazem Andersen (@JKazem)
• Lucas Mösch (@lmoesch)
• Niklas Hauser (@salkinium)
• Nikolay Semenov (@cocasema)
• Raphael Lehmann (@rleh)
• Sascha Schade (@strongly-typed)
• Steven Macías (@StevenMacias)

PR #917 -> 2022q3.

Detailed changelog

2022-09-30: Add SAMx5x/x7x device support

Also adds SAMV71 Xplained Ultra and SAME54 Xplained Pro board support packages
and examples. For consistency with other SAM devices, the SAMG Uart peripheral
has been renamed to Usart in a breaking change. The GCLK peripheral has been
refactored for consistency across and to remove hard-coded design choices.

PR #827 -> 8230fef.
Tested in hardware by @chris-durand with high impact on SAM devices.

2022-08-23: Add ST7789 display driver

PR #902 -> 516b2b3.
Tested in hardware by @cocasema.

2022-08-18: Add ThingPlus-RP2040 BSP

PR #900 -> 874c8d6.
Tested in hardware by @cocasema.

2022-08-18: Add RP2040 ADC driver

PR #899 -> 490e868.
Tested in hardware by @cocasema.

2022-08-17: Add Feather-RP2040 BSP

Also adds an option to set the flash size of the external flash chip.

PR #898 -> cceb801.
Tested in hardware by @cocasema.

2022-08-09: Add MCP9902/3/4 temperature sensor

PR #894 -> 0fd53a8.
Tested in hardware by @chris-durand.

2022-07-23: Add Nanopb with SCons integration

PR #657 -> 6b5b4ce.
Tested in hardware by @lmoesch.

2022-07-17: Add ADS7828 ADC driver

PR #887 -> 0cd2bc9.
Tested in hardware by @JKazem.