zephyr: boards: add support for Telink tlsr9518adk80d board

Signed-off-by: Alex Kolosov <rikorsev@gmail.com>
diff --git a/boot/zephyr/boards/tlsr9518adk80d.conf b/boot/zephyr/boards/tlsr9518adk80d.conf
new file mode 100644
index 0000000..8350a3b
--- /dev/null
+++ b/boot/zephyr/boards/tlsr9518adk80d.conf
@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2022 Telink Semiconductor
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+CONFIG_BOOT_MAX_IMG_SECTORS=4096