platform: generic: Tenstorrent Atlantis support

Add the Tenstorrent Atlantis as a generic-platform. This initial support
enables the single_fw_region option, and verifies and prints HART PMA
CSR configuration.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260424062520.238403-1-npiggin@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>

platform/generic/include/tenstorrent/ascalon.h

@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: (c) 2025-2026 Tenstorrent USA, Inc.
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#ifndef __TENSTORRENT_ASCALON_H__
+#define __TENSTORRENT_ASCALON_H__
+
+void tt_ascalon_discover_pmas_from_boot_hart(void);
+void tt_ascalon_verify_pmas_nonboot_hart(void);
+
+#endif