usb: host: add copyright notice to linker script

Add missing copyright notice for the linker script to help with
check_compliance.py.

Signed-off-by: Josuah Demangeon <[email protected]>

Author: Josuah Demangeon

subsys/usb/host/usbh_data.ld

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: Copyright The Zephyr Project Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <zephyr/linker/iterable_sections.h>
 
 ITERABLE_SECTION_RAM(usbh_context, Z_LINK_ITERABLE_SUBALIGN)