Add support for Allwinner F1Cx00s family

Allwinner F1Cx00s family is a series of SoCs
with Mentor MUSB controller and HS phy. It comes
with a slightly different register space layout,
and some quirks, so it's not multiplexed with
the existing musb support library.

This library currently requires to be compiled
with https://github.com/hongxuyao/F1C100s_with_Keil_RTX4_emWin5

src/tusb_option.h

@@ -136,6 +136,9 @@
 // Infineon
 #define OPT_MCU_XMC4000          1800 ///< Infineon XMC4000
 
+// Allwinner
+#define OPT_MCU_F1C100S          1900 ///< Allwinner F1C100s family
+
 // Helper to check if configured MCU is one of listed
 // Apply _TU_CHECK_MCU with || as separator to list of input
 #define _TU_CHECK_MCU(_m)   (CFG_TUSB_MCU == _m)