nyx: Add joycon fallback support as a virtual mouse

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nyx/nyx_gui/soc/clock.h

@@ -169,6 +169,8 @@ void clock_disable(const clock_t *clk);
 /*! Clock control for specific hardware portions. */
 void clock_enable_fuse(bool enable);
 void clock_enable_uart(u32 idx);
+void clock_disable_uart(u32 idx);
+int  clock_uart_use_src_div(u32 idx, u32 baud);
 void clock_enable_i2c(u32 idx);
 void clock_disable_i2c(u32 idx);
 void clock_enable_se();