[vim2] Update docs.

Change-Id: Ia474d9986819c204830a2df1d1c65fdc4122302e
diff --git a/docs/targets/khadas-vim.md b/docs/targets/khadas-vim.md
index 9650064..2abb771 100644
--- a/docs/targets/khadas-vim.md
+++ b/docs/targets/khadas-vim.md
@@ -13,6 +13,13 @@
 to run 2 cores out of 8 at full speed before reaching 80C, the critical
 temperature at which cores have to be throttled down.
 
+## Setup
+
+- USB C port: Connect to host. Provides power and `fastboot`.
+- Ethernet: Connect cable directly to board (do not use a USB ethernet adapter).
+- HDMI: Optional. Connects to display.
+- Serial Console: Optional but very useful. See next section.
+
 ## Serial Console
 
 The debug UART for the serial console is exposed on the 40 pin header at the back of the board.
@@ -40,7 +47,7 @@
 
 Booting Zircon on the VIM2 requires a custom bootloader.
 
-### [Googlers only] 
+### [Googlers only]
 Within Google, this can be found at [go/vim2-bootloader](http://go/vim2-bootloader). Download the .bin file and follow the instructions in the document.
 
 If you are not at Google, hang on until we make this publicly available.