Microchip: XEC RTOS timer: Add MEC172x support to driver

Update Microchip XEC RTOS timer driver adding MEC172x support and
using more device tree properities in the driver. We must also update
the XEC counter driver to use the new GIRQ DT properties.
Add new properties to RTOS timer and RTC timer YAML. These two timers
are linked due to option using a high speed timer for kernel busy wait.
Add Kconfig logic for XEC RTOS timer to MEC172x SoC.
Enable the Microchip XEC RTOS timer in the MEC172x evaluation board.
Add device tree nodes for most peripeherals.

Signed-off-by: Scott Worley <scott.worley@microchip.com>

dts/bindings/rtc/microchip,xec-timer.yaml

@@ -27,12 +27,28 @@ properties:
       required: true
       description: Maximum counter value the instance can handle
 
-    girq:
-      type: int
+    girqs:
+      type: array
       required: true
-      description: GIRQ for this device
+      description: Array of GIRQ numbers [8:26] and bit positions [0:31].
 
-    girq-bit:
-      type: int
+    pcrs:
+      type: array
       required: true
-      description: Bit position in GIRQ for this device
+      description: PCR sleep enable register index and bit position.
+
+    "girqs-cells":
+      type: int
+      const: 2
+
+    "#pcrs-cells":
+      type: int
+      const: 2
+
+girqs-cells:
+    - girq_num
+    - bitpos
+
+pcrs-cells:
+    - reg_index
+    - bitpos