#1748 replace incorrect license (#1749)

src/rp2_common/pico_double/double_v1_rom_shim.S

-/**
- * Copyright (c) 2020 Mark Owen https://www.quinapalus.com .
- *
- * Raspberry Pi (Trading) Ltd (Licensor) hereby grants to you a non-exclusive license to use the software solely on a
- * Raspberry Pi Pico device. No other use is permitted under the terms of this license.
- *
- * This software is also available from the copyright owner under GPLv2 licence.
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
  *
- * THIS SOFTWARE IS PROVIDED BY THE LICENSOR AND COPYRIGHT OWNER "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE LICENSOR OR COPYRIGHT OWNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include "pico/asm_helper.S"