sabrelite HW setup: mention SW1 position for old boards

SabreLite v1.0 has a reversed switch position for SW1 for
normal and USB-OTG boot. Since it is very rare and old board
there is no need to provide the photo but it is useful to mention
about the difference.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

content/reference_hardware/imx6q_sabrelite_setup.md

@@ -40,7 +40,7 @@ programmed onto the SD card.
   `SD4/BOOT`.
 - Attach the serial breakout cable to the SABRE Lite and connect the DB9
   connector labelled `CONSOLE` to the USB to serial cable.
-- Ensure the `SW1` switches are in the following positions:
+- Ensure the `SW1` switches are in the following positions (invert switch positions for v1.0 board):
 
 |        |          |                                                                      |
 | ------ | -------- | -------------------------------------------------------------------- |
@@ -92,7 +92,7 @@ a USB to microUSB cable.
 - Attach the microUSB cable to the `USB OTG` port and the other to your host.
   If using a development environment inside of VirtualBox, please ensure the
   [USB-OTG device is accessible from the VirtualBox virtual machine]( {{< ref "#virtualbox-setup-for-usb-otg" >}} ).
-- Ensure the `SW1` switches are in the following positions:
+- Ensure the `SW1` switches are in the following positions (invert switch positions for v1.0 board):
 
 |        |          |                                                                      |
 | ------ | -------- | -------------------------------------------------------------------- |
@@ -151,7 +151,7 @@ a USB to microUSB cable.
 
 - Remove the SD card and power down the board.
 - Ensure the `SW1` switches are returned to the following positions to allow
-  normal booting:
+  normal booting (invert switch positions for v1.0 board):
 
 |        |          |                                                                      |
 | ------ | -------- | -------------------------------------------------------------------- |