mb/system76/galp5: Add System76 Galago Pro 5

https://tech-docs.system76.com/models/galp5/README.html

Tested with TianoCore (UefiPayloadPkg).

Working:

- PS/2 keyboard, touchpad
- Both DIMM slots
- M.2 NVMe SSD
- All USB ports
- SD card reader
- Webcam
- Ethernet
- WiFi/Bluetooth
- Integrated graphics using Intel GOP driver
- HDMI output
- Internal microphone
- Internal speakers
- Combined 3.5mm headphone/microphone jack
- S0ix suspend*
- Booting to Pop!_OS Linux 21.04 and Windows 10
- Flashing with flashrom

Not working:

- Discrete/Hybrid graphics
- S0ix when a device is attached to the TBT port

Change-Id: I0d9052c0b064d4d43812ad837578d4a097149cc8
Signed-off-by: Jeremy Soller <jeremy@system76.com>
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/system76/galp5/bootblock.c

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <gpio.h>
+#include "gpio.h"
+
+void bootblock_mainboard_early_init(void)
+{
+	gpio_configure_pads(early_gpio_table, ARRAY_SIZE(early_gpio_table));
+}