rockchip: Allow Bob to use SPI boot

Bob is a Chromebook and can boot from SPI flash. Add it to the condition
check for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-rockchip/spl.c b/arch/arm/mach-rockchip/spl.c
index cddf4fd..f148d48 100644
--- a/arch/arm/mach-rockchip/spl.c
+++ b/arch/arm/mach-rockchip/spl.c
@@ -54,7 +54,8 @@
 #if defined(CONFIG_TARGET_CHROMEBOOK_JERRY) || \
 		defined(CONFIG_TARGET_CHROMEBIT_MICKEY) || \
 		defined(CONFIG_TARGET_CHROMEBOOK_MINNIE) || \
-		defined(CONFIG_TARGET_CHROMEBOOK_SPEEDY)
+		defined(CONFIG_TARGET_CHROMEBOOK_SPEEDY) || \
+		defined(CONFIG_TARGET_CHROMEBOOK_BOB)
 	return BOOT_DEVICE_SPI;
 #endif
 	if (CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM))