Description: fpga: dfl-afu-region: Add overflow checks for region size and offset
References:
 https://patchwork.kernel.org/project/linux-fpga/patch/20230206054326.89323-1-k1rh4.lee@gmail.com/
Notes:
 carnil> CONFIG_FPGA_DFL_AFU not enabled in Debian.
Bugs:
upstream: needed
6.1-upstream-stable: needed
5.10-upstream-stable: needed
4.19-upstream-stable: needed
sid: needed
6.1-bookworm-security: needed
5.10-bullseye-security: needed
4.19-buster-security: needed