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/waveshare-s3-lcd-13/waveshare,s3-lcd-13.dts

@@ -6,6 +6,8 @@
 #include <tactility/bindings/esp32_i2c.h>
 #include <tactility/bindings/esp32_spi.h>
 #include <bindings/qmi8658.h>
+#include <tactility/bindings/esp32_sdspi.h>
+#include <tactility/bindings/display_placeholder.h>
 
 // Reference: https://www.waveshare.com/wiki/ESP32-S3-LCD-1.3
 / {
@@ -37,15 +39,26 @@
 	spi0 {
 		compatible = "espressif,esp32-spi";
 		host = <SPI2_HOST>;
+		cs-gpios = <&gpio0 39 GPIO_FLAG_NONE>;
 		pin-mosi = <&gpio0 41 GPIO_FLAG_NONE>;
 		pin-sclk = <&gpio0 40 GPIO_FLAG_NONE>;
+	
+		display {
+			compatible = "display-placeholder";
+		};
 	};
 
 	spi1 {
 		compatible = "espressif,esp32-spi";
 		host = <SPI3_HOST>;
+		cs-gpios = <&gpio0 17 GPIO_FLAG_NONE>;
 		pin-mosi = <&gpio0 18 GPIO_FLAG_NONE>;
 		pin-miso = <&gpio0 16 GPIO_FLAG_NONE>;
 		pin-sclk = <&gpio0 21 GPIO_FLAG_NONE>;
+	
+		sdcard@0 {
+			compatible = "espressif,esp32-sdspi";
+			frequency-khz = <20000>;
+		};
 	};
 };