Add Hardkernel ODROID-C4 as compatible device

Closes #348.

Author: mvp

README.md

@@ -52,6 +52,7 @@ This is list of known compatible USB hubs:
 | Elecom             | U2H-G4S                                              | 4     | 2.0 |           | 2006    | 2011 |
 | ExSys              | EX-1113HMS                                           | 16    | 3.1 |           | 2018    |      |
 | GlobalScale        | ESPRESSObin SBUD102 V5                               | 1     | 3.0 |`1D6B:0003`| 2017    |      |
+| Hardkernel         | ODROID-C4 ([note](https://git.io/JG0mP))             | 4     | 3.0 |           | 2020    |      |
 | Hawking Technology | UH214                                                | 4     | 2.0 |           | 2003    | 2008 |
 | IOI                | U3H415E1                                             | 4     | 3.0 |           | 2012    |      |
 | j5create           | JUH470 (works only in USB2 mode)                     | 3     | 3.0 |`05E3:0610`| 2014    |      |