MAINTAINERS.yml: Add Drivers: RTC: entry

Added initial maintainers entry for RTC. Will be
expanded with collaborators before merged.

Signed-off-by: Bjarki Arge Andreasen <baa@trackunit.com>
diff --git a/MAINTAINERS.yml b/MAINTAINERS.yml
index 59e2d01..85c8c91 100644
--- a/MAINTAINERS.yml
+++ b/MAINTAINERS.yml
@@ -1112,6 +1112,18 @@
   labels:
     - "area: Retained Memory"
 
+"Drivers: RTC":
+  status: maintained
+  maintainers:
+    - bjarki-trackunit
+  files:
+    - drivers/rtc/
+    - tests/drivers/rtc/
+    - doc/hardware/peripherals/rtc.rst
+    - include/zephyr/drivers/rtc.h
+  labels:
+    - "area: RTC"
+
 "Drivers: PCI":
   status: maintained
   maintainers: