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)

Platforms/platform-esp32/private/tactility/drivers/esp32_sdspi_fs.h

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <sd_protocol_types.h>
+#include <tactility/filesystem/file_system.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Esp32SdspiConfig;
+typedef void* Esp32SdspiHandle;
+
+Esp32SdspiHandle esp32_sdspi_fs_alloc(const struct Esp32SdspiConfig* config, int spi_host, int cs_pin, const char* mount_path);
+void esp32_sdspi_fs_free(Esp32SdspiHandle handle);
+sdmmc_card_t* esp32_sdspi_fs_get_card(Esp32SdspiHandle handle);
+
+extern const FileSystemApi esp32_sdspi_fs_api;
+
+#ifdef __cplusplus
+}
+#endif