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()

Platforms/PlatformEsp32/Bindings/espressif,esp32-uart.yaml

@@ -0,0 +1,27 @@
+description: ESP32 UART Controller
+
+include: ["uart-controller.yaml"]
+
+compatible: "espressif,esp32-uart"
+
+properties:
+  port:
+    type: int
+    required: true
+    description: |
+      The port number, defined by uart_port_t.
+      Depending on the hardware, these values are available: UART_NUM_0, UART_NUM_1, UART_NUM_2
+  pin-tx:
+    type: int
+    required: true
+    description: TX pin
+  pin-rx:
+    type: int
+    required: true
+    description: RX pin
+  pin-cts:
+    type: int
+    description: CTS pin
+  pin-rts:
+    type: int
+    description: RTS pin