Backports of 2e43ae7dd71cd9bb0d1bce1d3306bf77523feb81 for 5.15 and older

Hi Greg and Sasha,

Please find attached backports of commit 2e43ae7dd71c ("drm/i915/gvt: fix unterminated-string-initialization warning") to address an instance of -Wunterminated-string-initialization that appears in the i915 driver with GCC 15 and Clang 21 due to its use of -Wextra. Please let me know if there are any issues.

Cheers, Nathan