[WIP] OptiPlex 3050 Micro port

- Boots Linux
- SMSC SCH5553 SIO/EC
  + Early EC init + HWM init implemented
  + Console on serial port tested
  + TODO: late HWM init for fan control (fan runs at low speed now)
- Realtek Gigabit LAN works
- WiFi slot works
- NVMe SSD slot works
- Extra: LPSS UART0
  + Stock FW sets undocumented power gating bit, RTC battery needs to
    be pulled for it to work.
  + Signals exposed on test points on the back of the board.
    FIXME: add documentation about this
- Needs 'deguard' to bypass BootGuard
  + See https://review.coreboot.org/plugins/gitiles/deguard
- TODO: HDA verbs
- TODO: USB ports
- TODO: Add VBT
- Currently limited to the Micro form factor, but others are very
  similar

Change-Id: I8d443e39ee684a4eaa19c835a945cfe569c051e2
Signed-off-by: Mate Kukri <kukri.mate@gmail.com>
---
A src/mainboard/dell/optiplex_3050/Kconfig
A src/mainboard/dell/optiplex_3050/Kconfig.name
A src/mainboard/dell/optiplex_3050/Makefile.mk
A src/mainboard/dell/optiplex_3050/acpi/ec.asl
A src/mainboard/dell/optiplex_3050/acpi/superio.asl
A src/mainboard/dell/optiplex_3050/board_info.txt
A src/mainboard/dell/optiplex_3050/bootblock.c
A src/mainboard/dell/optiplex_3050/cmos.default
A src/mainboard/dell/optiplex_3050/cmos.layout
A src/mainboard/dell/optiplex_3050/devicetree.cb
A src/mainboard/dell/optiplex_3050/dsdt.asl
A src/mainboard/dell/optiplex_3050/gma-mainboard.ads
A src/mainboard/dell/optiplex_3050/include/early_gpio.h
A src/mainboard/dell/optiplex_3050/include/gpio.h
A src/mainboard/dell/optiplex_3050/ramstage.c
A src/mainboard/dell/optiplex_3050/romstage.c
A src/mainboard/dell/optiplex_3050/sch5555_ec.c
A src/mainboard/dell/optiplex_3050/sch5555_ec.h
18 files changed, 754 insertions(+), 0 deletions(-)