Add kernel drivers for SPI and UART and make locking APIs more consistent (#489)

- Add kernel support for SPI driver
- Add kernel support for UART driver
- Implemented ESP32 UART kernel driver
- Update existing UART-related code in Tactility to use new kernel driver
- Remove UART from tt::hal::Configuration
- Remove tt_hal_uart functionality but keep functions for now
- Update devicetrees for UART changes
- Kernel mutex and recursive mutex: improved locking API design
- Other kernel improvements
- Added device_exists_of_type() and device_find_by_name()

Modules/hal-device-module/Source/drivers/hal_device.cpp

@@ -110,7 +110,9 @@ static error_t stop(Device* device) {
 
 extern "C" {
 
-extern const struct DeviceType HAL_DEVICE_TYPE {0};
+const struct DeviceType HAL_DEVICE_TYPE {
+    "hal-device"
+};
 
 extern struct Module hal_device_module;