Debug console

[cepetr]

This PR introduces a new dbg_console kernel module that introduces new logging layer that allows
printing debug output via ITM SWO, SEGGER SystemView, or USB VCP.

The new dbg_printf() can now be called anywhere in the codebase (including interrupt routines, when not using the VCP target).

The output target can be selected with the new DBG_CONSOLE argument from the command line when building the firmware. The same approach is used across all layers: coreapp, kernel, secmon, bootloader, boardloader, and prodtest.

make build_firmware DBG_CONSOLE=<xxx>

where <xxx> can be

• SWO - logging via ITM SWO (requires ST-Link or J-Link)
• SYSTEM_VIEW - logging via SEGGER SystemView (requires J-Link)
• VCP - logging via USB VCP
• empty - logging is disabled

For the firmware build:

• if PYOPT=0, DBG_CONSOLE defaults to VCP
• if PYOPT=1, DBG_CONSOLE defaults to an empty string (logging disabled)

DBG_CONSOLE be also used when building boardloader, bootloader and prodtest. For these targets, it defaults to an empty string (logging disabled).

The following table show valid combinations:

	bootloader	boardloader	prodtest	coreapp	kernel	secmon
SWO	✓	✓	✓	✓	✓	✓
SYSTEM_VIEW	✓	✓	✓	✓	✓	✓
VCP	✓			✓	✓

Resolves #4253 - to enable Optiga logging, USE_OPTIGA_LOGGING must be defined.

NOTE: Optiga logging works only with SWO or SYSTEM_VIEW on T3W1 (since the Optiga driver is implemented in secmon on T3W1)

[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Latest CI run: 17154342236