drivers/timer: Use DTS interrupt info for XEC driver

irq and irq priority must be taken from DTS generated configuration
macros.

Seems like driver requires the priority to be set to 1, thus setting it
to 1 in the relevant dtsi file.

Fixes zephyrproject-rtos#17775

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

drivers/timer/mchp_xec_rtos_timer.c

@@ -265,15 +265,17 @@ int z_clock_driver_init(struct device *device)
 
 	RTMR_REGS->CTRL = 0U;
 	GIRQ23_REGS->SRC = MCHP_RTMR_GIRQ_VAL;
-	NVIC_ClearPendingIRQ(RTMR_IRQn);
+	NVIC_ClearPendingIRQ(DT_INST_0_MICROCHIP_XEC_RTOS_TIMER_IRQ_0);
 
 	timer_restart(cached_icr);
 
-	IRQ_CONNECT(RTMR_IRQn, 1, xec_rtos_timer_isr, 0, 0);
+	IRQ_CONNECT(DT_INST_0_MICROCHIP_XEC_RTOS_TIMER_IRQ_0,
+		    DT_INST_0_MICROCHIP_XEC_RTOS_TIMER_IRQ_0_PRIORITY,
+		    xec_rtos_timer_isr, NULL, 0);
 	GIRQ23_REGS->EN_SET = MCHP_RTMR_GIRQ_VAL;
 
 	RTMR_REGS->CTRL = TIMER_START_VAL;
-	irq_enable(RTMR_IRQn);
+	irq_enable(DT_INST_0_MICROCHIP_XEC_RTOS_TIMER_IRQ_0);
 
 	return 0;
 }

dts/arm/microchip/mec1501hsz.dtsi

@@ -33,7 +33,7 @@
 		rtimer: timer@40007400 {
 			compatible = "microchip,xec-rtos-timer";
 			reg = <0x40007400 0x10>;
-			interrupts = <111 0>;
+			interrupts = <111 1>;
 			label = "RTIMER";
 		};
 		uart0: uart@400f2400 {