dts: x86: intel: panther_lake: Update RTC to support MFD method

Updated RTC to support MFD method on panther lake platform
and board config to include alarm and update tests.
-boards/intel/ptl/
-dts/x86/intel/
-tests/drivers/rtc/rtc_api/

Signed-off-by: Anisetti Avinash Krishna <anisetti.avinash.krishna@intel.com>

boards/intel/ptl/intel_ptl_h_crb.dts

@@ -36,6 +36,10 @@
 	status = "okay";
 };
 
+&mfd {
+	status = "okay";
+};
+
 &smbus0 {
 	status = "okay";
 };

dts/x86/intel/panther_lake_h.dtsi

@@ -302,12 +302,25 @@
 			status = "disabled";
 		};
 
-		rtc: counter: rtc@70 {
-			compatible = "motorola,mc146818";
-			reg = <0x70 0x0D 0x71 0x0D>;
-			interrupts = <8 IRQ_TYPE_LOWEST_EDGE_RISING 3>;
-			interrupt-parent = <&intc>;
-			alarms-count = <1>;
+		mfd: mfd@70 {
+			compatible = "motorola,mc146818-mfd";
+			reg = <0x70 0x01 0x71 0x01 0x72 0x01 0x73 0x01>;
+
+			rtc: counter: rtc {
+				compatible = "motorola,mc146818";
+				interrupts = <8 IRQ_TYPE_LOWEST_EDGE_RISING 3>;
+				interrupt-parent = <&intc>;
+				alarms-count = <1>;
+
+				status = "disabled";
+			};
+
+			bbram: bbram {
+				compatible = "motorola,mc146818-bbram";
+				size = <241>;
+				status = "disabled";
+			};
+
 			status = "disabled";
 		};
 

tests/drivers/rtc/rtc_api/boards/intel_ptl_h_crb.conf

@@ -0,0 +1,2 @@
+CONFIG_RTC_ALARM=y
+CONFIG_RTC_UPDATE=y