[nrf noup] boot: zephyr: add support for Thingy:91

Adds project configurations for the two systems on the Thingy:91
(PCA-20035) board.

The bootloader that is factory-programmed on thing91 does not support
ECDSA signature type. Hence this commit also sets the signature type
to RSA for applications built for Thingy:91.

Signed-off-by: Bernt Johan Damslora <bernt.johan.damslora@nordicsemi.no>
Signed-off-by: Sigvart Hovland <sigvart.hovland@nordicsemi.no>
Signed-off-by: Jon Helge Nistad <jon.helge.nistad@nordicsemi.no>
Signed-off-by: Balaji Srinivasan <balaji.srinivasan@nordicsemi.no>
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>
Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
(cherry picked from commit 15661cf)
(cherry picked from commit a7a0ac5)

boot/zephyr/boards/thingy91_nrf52840.conf

@@ -0,0 +1,34 @@
+# Disable Zephyr console
+CONFIG_LOG=n
+CONFIG_CONSOLE=n
+CONFIG_CONSOLE_HANDLER=n
+CONFIG_UART_CONSOLE=n
+
+# The build won't fit on the partition allocated for it without size
+# optimizations.
+CONFIG_SIZE_OPTIMIZATIONS=y
+CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x12000
+
+# Serial
+CONFIG_SERIAL=y
+CONFIG_UART_NRFX=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_UART_LINE_CTRL=y
+
+# MCUboot serial recovery
+CONFIG_GPIO=y
+CONFIG_MCUBOOT_SERIAL=y
+CONFIG_BOOT_SERIAL_CDC_ACM=y
+
+# Required by USB
+CONFIG_MULTITHREADING=y
+
+# USB
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_PRODUCT="MCUBOOT"
+CONFIG_USB_CDC_ACM=y
+CONFIG_USB_COMPOSITE_DEVICE=y
+CONFIG_USB_MASS_STORAGE=n
+CONFIG_USB_DEVICE_MANUFACTURER="Nordic Semiconductor"
+CONFIG_USB_DEVICE_VID=0x1915
+CONFIG_USB_DEVICE_PID=0x520F

boot/zephyr/boards/thingy91_nrf9160.conf

@@ -0,0 +1,13 @@
+# Disable Zephyr console
+CONFIG_CONSOLE=n
+CONFIG_CONSOLE_HANDLER=n
+CONFIG_UART_CONSOLE=n
+
+# Disable Flash protection
+CONFIG_FPROTECT=n
+
+# MCUBoot settings
+CONFIG_BOOT_MAX_IMG_SECTORS=256
+
+# MCUboot serial recovery
+CONFIG_MCUBOOT_SERIAL=y