Driver improvements (#535)

- New drivers:
  - SD SPI
  - spi_peripheral
  - touch_placeholder
  - display_placeholder
- Devicetree compiler:
  - Implement phandle-arrays
  - Implement device addresses
- Add placeholder drivers to all devices with a SPI display
- SPI driver: add `cs-pins` and set them to high on driver start
- FileSystem: add `file_system_set_owner()` and `file_system_get_owner()`
- File locking is now checking if the related `FileSystem` is part of a shared SPI bus
- Add `device_get_child_count()`
- SDMMC driver: Remove default of `slot` value
- Fix for Crowpanel Basic 3.5" display (add delay to booting)
- Fix for LilyGO T-HMI SD card mounting (delayed mounting by disabling it initially in the dts)

Devices/elecrow-crowpanel-basic-35/Source/Configuration.cpp

@@ -1,20 +1,21 @@
 #include "PwmBacklight.h"
 #include "devices/Display.h"
-#include "devices/SdCard.h"
-#include <driver/gpio.h>
 
 #include <Tactility/hal/Configuration.h>
 
 using namespace tt::hal;
 
 static bool initBoot() {
-    return driver::pwmbacklight::init(GPIO_NUM_27);
+    driver::pwmbacklight::init(GPIO_NUM_27);
+    // Delay is required, or GUI will lock up.
+    // It's possibly related to the increased power draw when turning on the backlight.
+    vTaskDelay(100);
+    return true;
 }
 
 static DeviceVector createDevices() {
     return {
         createDisplay(),
-        createSdCard()
     };
 }