rockchip: Add support for chromebook_bob

Bob is a 10-inch chromebook produced by Asus. It has two USB 3.0 type-C
ports, 4GB of SDRAM, WiFi and a 1280x800 display. It uses its USB ports
for both power and external display. It includes a Chrome OS EC
(Cortex-M3) to provide access to the keyboard and battery functions.

Support so far includes only:
- UART
- SDRAM
- MMC, SD card
- Cros EC (but not keyboard)

Not included:
- Keyboard
- Display
- Sound
- USB
- TPM

Bob is quite similar to Kevin, the Samsung Chromebook Plus, but support
for this is not provided in this series.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/mach-rockchip/rk3399/Kconfig b/arch/arm/mach-rockchip/rk3399/Kconfig
index 8f18e33..2408adb 100644
--- a/arch/arm/mach-rockchip/rk3399/Kconfig
+++ b/arch/arm/mach-rockchip/rk3399/Kconfig
@@ -53,6 +53,15 @@
 	   * 2x USB 3.0 type A, 2x USB 2.0 type A (host mode only),
 	     1x USB 3.0 type C OTG
 
+config TARGET_CHROMEBOOK_BOB
+	bool "Asus Flip C101PA Chromebook (RK3399)"
+	help
+	  Bob is a small RK3299-based device similar in apperance to Minnie.
+	  It has two USB 3.0 type-C ports, 4GB of SDRAM, WiFi and a 10.1",
+	  1280x800 display. It uses its USB ports for both power and external
+	  display. It includes a Chrome OS EC (Cortex-M3) to provide access to
+	  the keyboard and battery functions.
+
 endchoice
 
 config SYS_SOC
@@ -64,5 +73,6 @@
 source "board/rockchip/evb_rk3399/Kconfig"
 source "board/theobroma-systems/puma_rk3399/Kconfig"
 source "board/vamrs/rock960_rk3399/Kconfig"
+source "board/google/gru/Kconfig"
 
 endif