scripts: requirements: extras: add spsdk

Secure Provisioning SDK (SPSDK) is a unified, reliable,
and easy to use Python SDK library working across the
NXP MCU portfolio providing a strong foundation from
quick customer prototyping up to production deployment.

Docs: https://spsdk.readthedocs.io

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>

scripts/requirements-extras.txt

@@ -15,6 +15,9 @@ junit2html
 # Script used to build firmware images for NXP LPC MCUs.
 lpc_checksum
 
+# used by NXP platform to generate/flash firmware images
+spsdk == 2.6.0
+
 # used by scripts/build/gen_cfb_font_header.py - helper script for user
 Pillow>=10.3.0