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

Display PoC

Import hwinit (with small changes) and exosphère drivers

Add build system for fusee

Fix off-by-one mkey revision errors

Remove useless "pack" pragmas

Add spsr_el3 to cpu_context

Fix LP0 TZRAM CMAC calculation

Fix LP0 entry. Exit still fails in warmboot bin.

Fix CpuSuspend not making it to finalize_powerdown()

Fix CAR primitives

Fix flow controller set functions

Fix and/bic inversions in finalize_powerdown

Add 4.x configitem stuff

Fix async expMod output + smcUnwrapAesWrappedTitlekey

Fix AES-GCM code.

Fix smcComputeCmac, generally improve userpage cache usage

Fix AES ECB encryption not encrypting

memcpy(x, NULL, 0) is undefined behavior

Implement BootReason config

Use and adapt the UART driver from hekate/hwinit

Fix fuse_get_hardware_type for 4.x

Fix and with mask issue in smc_user.c

Fix up comment

Fix user_generate_specific_aes_key wrong register use

Fix bug in user_generate_specific_aes_key, add other read/write le/be funcs

Fix freudian slip

Add debug region to mapped memory

Fix smcConfigureCarveout

Merge branch 'master' of https://github.com/SciresM/Atmosphere-NX