Update flash drivers to support QuadSPI

- Update flash w25n01g driver to support QuadSPI.

- flash_m25p16 update for QuadSPI support

- w25m driver update for QuadSPI support

- Use 100Mhz (ULTRAFAST) clock for QuadSPI w25n01

- Conditionalize QUADSPI code in w25n01g driver

- Use handle instead of handle_u

src/main/drivers/flash_impl.h

@@ -28,8 +28,23 @@
 
 struct flashVTable_s;
 
+typedef enum {
+    FLASHIO_NONE = 0,
+    FLASHIO_SPI,
+    FLASHIO_QUADSPI
+} flashDeviceIoMode_e;
+
+typedef struct flashDeviceIO_s {
+    union {
+        busDevice_t *busdev; // Device interface dependent handle (spi/i2c)
+    #ifdef USE_QUADSPI
+        QUADSPI_TypeDef *quadSpi;
+    #endif
+    } handle;
+    flashDeviceIoMode_e mode;
+} flashDeviceIO_t;
+
 typedef struct flashDevice_s {
-    busDevice_t *busdev;
     const struct flashVTable_s *vTable;
     flashGeometry_t geometry;
     uint32_t currentWriteAddress;
@@ -38,6 +53,7 @@ typedef struct flashDevice_s {
     // for writes. This allows us to avoid polling for writable status
     // when it is definitely ready already.
     bool couldBeBusy;
+    flashDeviceIO_t io;
 } flashDevice_t;
 
 typedef struct flashVTable_s {