exosphere: Add package2 support for 6.0.0

fusee: Move nxboot hand-off to IRAM. ...

fusee/exosphere: Minor cleanup.

exosphere: Add support for 6.0.0.

Add and fix copyright notices for better GPL compliance (thanks @naehrwert and @CTCaer).

exosphere: commit WIP warmboot progress ...

-15+ bugs fixed
-We now receive ~0x400 SMCs from user processes
 (including from psm) on wake-from-sleep

Exosphere: Fix bugs, now boots 5.1.0 successfully.

Exosphere: Fix SE definition bug, misc other bugs. Now boots on 1.0.0

Exosphere: Fix MC carveout setup bug, now receives smcCpuOn from kernel on 1.0.0.

Exosphere: Fix extremely spooky Security Engine bugs, now makes it to the end of package2loader.

[exosphere] Fix bug in package2.c

[exosphere] Rewrite crt0/init and ld script

Exosphere: Support unsigned/plaintext Package2s if signature is clear.

Integrate 5.x SMC API changes, add 4.x specific setup, implement target firmware selection

memcpy(x, NULL, 0) is undefined behavior

Implement BootReason config

Add most of warmboot_main

Change 'success' panic location to end of coldboot_main()

Cleanup TODOs, implement bootconfig SCR_EL3 bit setting

Implement CPU state init, fix bug in cpu_context restore

Add call to se_generate_stored_vector() before validating

Update pk2ldr outline, prepare for bootup_misc_mmio() impl

Reintroduce unmap_* in package2.c

Fix dangling comments

Fix up package2.c, current build makes it to the panic() on hardware

Rewrite relocation stuff

Implements missings parts of pk2ldr, refactor relocation a bit

Properly detect PK21 master key rev.

Fix PK2LDR bugs, Fix SE bugs

Implement flush_dcache_all_tzram_pa and invalidate_icache_all_inner_shareable_tzram_pa for the crt0s

Implement BootConfig.