icE1usb fw: Fix typo in SPDX header

Those files barely even qualify for a license anyway but for
consistency's sake ...

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I9585f7f01d2dc8393828aa264ae353e2a53a37dd
diff --git a/firmware/ice40-riscv/icE1usb/config.h b/firmware/ice40-riscv/icE1usb/config.h
index f467b65..a27a53c 100644
--- a/firmware/ice40-riscv/icE1usb/config.h
+++ b/firmware/ice40-riscv/icE1usb/config.h
@@ -2,7 +2,7 @@
  * config.h
  *
  * Copyright (C) 2019-2020  Sylvain Munaut <tnt@246tNt.com>
- * SPDX-License-Identifier: LGPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 #pragma once
diff --git a/firmware/ice40-riscv/icE1usb/usb_desc_ids.h b/firmware/ice40-riscv/icE1usb/usb_desc_ids.h
index ab3d156..df0331e 100644
--- a/firmware/ice40-riscv/icE1usb/usb_desc_ids.h
+++ b/firmware/ice40-riscv/icE1usb/usb_desc_ids.h
@@ -2,7 +2,7 @@
  * usb_desc_ids.h
  *
  * Copyright (C) 2022  Sylvain Munaut <tnt@246tNt.com>
- * SPDX-License-Identifier: LGPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 #pragma once