tests: drivers: rtc: Add support for the sam_e54_xpro board

Added sam_e54_xpro.conf file

Signed-off-by: farsin NASAR V A <[email protected]>

Author: Farsin-Nasar-Microchip

tests/drivers/rtc/rtc_api/boards/sam_e54_xpro.conf

@@ -0,0 +1,6 @@
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_RTC_ALARM=y
+CONFIG_TEST_RTC_ALARM_TIME_MASK=63
+CONFIG_RTC_CALIBRATION=y