board: beagle: Add BeagleBone AI-64 support

Add base support for BeagleBone AI-64 board support.

Further information at  https://beagleboard.org/ai-64

Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/board/beagle/beagleboneai64/pm-cfg.yaml b/board/beagle/beagleboneai64/pm-cfg.yaml
new file mode 100644
index 0000000..7ae52b3
--- /dev/null
+++ b/board/beagle/beagleboneai64/pm-cfg.yaml
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2022-2023 Texas Instruments Incorporated - https://www.ti.com/
+#
+# Power management configuration for J721E
+#
+
+---
+
+pm-cfg:
+        rev:
+                boardcfg_abi_maj: 0x0
+                boardcfg_abi_min: 0x1