Update windows drivers instructions

Signed-off-by: Egor Savkin <es@m-labs.hk>

src/sw_sup/flashing_firmware.md

@@ -14,5 +14,7 @@ On Windows, a third-party tool, Zadig, is necessary. Use it as follows:
 3. Select the “Digilent Adept USB Device (Interface 0)” or “FTDI Quad-RS232 HS” (or similar) device from the drop-down list.
 4. Select WinUSB from the spinner list.
 5. Click “Install Driver” or “Replace Driver”.
+6. After above steps done, you may see the devices in the Device Manager:
+   ![after_zadig_devices.png](../img/win32/after_zadig_devices.png)
 
 You may need to repeat these steps every time you plug the FPGA board into a port where it has not been plugged into previously on the same system.

src/sw_sup/uart_logs.md

@@ -26,7 +26,9 @@ until its fully loaded.
 
 Use following instructions to set correct drivers for the COM ports.
 At choosing FTDI drivers stage you may have longer list of drivers. 
-In that case, choose respective `USB Serial Converter X` (A for 0, B for 1, C for 2, D for 3) driver. 
+In that case, choose respective `USB Serial Converter X` (A for 0, B for 1, C for 2, D for 3) driver. In case you cannot
+locate the devices, they may appear in the _Other devices_ section:
+![other_devices_section.png](../img/win32/other_devices_section.png)
 You may also need to reboot your PC after doing this.
 
 1. ![com_driver_set0.png](../img/win32/com_driver_set0.png)
@@ -37,6 +39,9 @@ You may also need to reboot your PC after doing this.
 6. ![com_driver_set5.png](../img/win32/com_driver_set5.png)
 7. ![com_driver_set6.png](../img/win32/com_driver_set6.png)
 
+If you are here after [flashing firmware](flashing_firmware.md) stage, you may fail to see the devices in the described locations.
+If you see them in the `Universal Serial Bus devices` section, you may need just to uninstall the third _Quad_ device and reconnect the
+Kasli/Kasli-SoC to the PC.
 
 #### Connecting with PuTTY