add WIP for Unit C6L (#7433)

* add WIP for Unit C6L
* adapt to new config structure
* Add c6l BLE and screen support (#7991)
* Minor c6l fix
* Move out of PRIVATE_HW
---------
Co-authored-by: Austin <vidplace7@gmail.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>
Co-authored-by: Jason P <Xaositek@users.noreply.github.com>
Co-authored-by: Markus <Links2004@users.noreply.github.com>

src/graphics/images.h

@@ -287,6 +287,9 @@ const uint8_t digital_icon_clock[] PROGMEM = {0b00111100, 0b01000010, 0b10000101
 #define analog_icon_clock_height 8
 const uint8_t analog_icon_clock[] PROGMEM = {0b11111111, 0b01000010, 0b00100100, 0b00011000,
                                              0b00100100, 0b01000010, 0b01000010, 0b11111111};
-
+#ifdef M5STACK_UNITC6L
+#include "img/icon_small.xbm"
+#else
 #include "img/icon.xbm"
+#endif
 static_assert(sizeof(icon_bits) >= 0, "Silence unused variable warning");