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()

Devices/simulator/Source/Simulator.cpp

@@ -21,15 +21,5 @@ static std::vector<std::shared_ptr<tt::hal::Device>> createDevices() {
 
 extern const Configuration hardwareConfiguration = {
     .initBoot = nullptr,
-    .createDevices = createDevices,
-    .uart = {
-        uart::Configuration {
-            .name = "/dev/ttyUSB0",
-            .baudRate = 115200
-        },
-        uart::Configuration {
-            .name = "/dev/ttyACM0",
-            .baudRate = 115200
-        }
-    }
+    .createDevices = createDevices
 };