CVE-2025-38274 fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt()

In the Linux kernel, the following vulnerability has been resolved: fpga: fix potential null pointer deref in fpgamgrtestimgloadsgt fpgamgrtestimgloadsgt allocates memory for sgt using kunitkzalloc however it does not check if the allocation failed. It then passes sgt to sgalloctable, which passe...