exo/mariko_fatal: add sdmmc write function

mariko fatal: map 0xC0000000 for framebuffer usage

exo: read first two sd card sectors in mariko_fatal

exo: implement start of mariko fatal handler

boot: update DisplayConfigMipiCal01 to reflect newest boot sysmodule

git subrepo push emummc ...

subrepo:
  subdir:   "emummc"
  merged:   "791681f5"
upstream:
  origin:   "https://github.com/m4xw/emuMMC"
  branch:   "develop"
  commit:   "791681f5"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

emummc: add GetSocType/GetHardwareType utils

git subrepo clone --force --branch=develop https://github.com/m4xw/emummc ...

subrepo:
  subdir:   "emummc"
  merged:   "24bdbec8"
upstream:
  origin:   "https://github.com/m4xw/emummc"
  branch:   "develop"
  commit:   "24bdbec8"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

exo: upload memory layout design document I use

exo: map stack region for mariko-only program

exo: load mariko-only program during boot

exo: add logging to boot under debug config

exo: free space by moving keys to volatile iram, support logging under debug config

exo: shuffle logic around to support debug code region in iram

exo: disable untranslated gpu accesses on mariko

exosphere: release, debug, audit configs

exo/program: release, debug, audit configs

rebootstub: audit/debug/release

libexo/sc7fw: support release/debug/audit

libexosphere: support building under debug/audit configurations

exo: reserve a portion of iram for secure monitor debug (including code)

boot2: don't wait for bpc.mitm on mariko

bpc.mitm: don't mitm bpc on mariko

i2c: correct missing destruction

ams.mitm: provide different boot0-protection for custom public key

wec: whoops

updater: don't overwrite custom-public-key BCTs

pinmux: whoops

boot/powctl/i2c: more miscellaneous fixes

boot: various bugfixes (b/w logo displays now)