samples: net: lwm2m_client: add hl78xx driver config file

Add HL78xx driver config to lwm2m_client sample

Signed-off-by: Zafer SEN <zafersn93@gmail.com>

Author: zafersn

drivers/modem/hl78xx/CMakeLists.txt

@@ -0,0 +1,16 @@
+#
+#  Copyright (c) 2025 Netfeasa
+#
+#  SPDX-License-Identifier: Apache-2.0
+#
+zephyr_library()
+
+zephyr_library_sources(
+    hl78xx.c
+    hl78xx_sockets.c
+    hl78xx_utility.c
+
+)
+
+zephyr_library_include_directories(${ZEPHYR_BASE}/subsys/net/ip)
+zephyr_library_include_directories(${ZEPHYR_BASE}/subsys/net/lib/sockets)