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)

Tactility/Private/Tactility/hal/SdCard.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <memory.h>
+#include <string.h>
+
+#include <Tactility/Lock.h>
+
+namespace tt::hal::sdcard {
+
+/**
+ * Attempt to find an SD card that the specified belongs to,
+ * and returns its lock if the SD card is mounted. Otherwise it returns nullptr.
+ * @param[in] a path on a file system (e.g. file, directory, etc.)
+ * @return the lock of a mounted SD card or otherwise null
+ */
+std::shared_ptr<Lock> findSdCardLock(const std::string& path);
+
+void mountAll();
+
+}

Tactility/Private/Tactility/hal/sdcard/SdCardMounting.h

@@ -1,7 +0,0 @@
-#pragma once
-
-namespace tt::hal::sdcard {
-
-void mountAll();
-
-}