mkinitramfs runs modinfo -F firmware i915 which only lists the following files:
i915/bxt_dmc_ver1_07.bin
i915/skl_dmc_ver1_26.bin
i915/kbl_dmc_ver1_01.bin
i915/skl_guc_ver6_1.bin
i915/kbl_huc_ver02_00_1810.bin
i915/bxt_huc_ver01_07_1398.bin
i915/skl_huc_ver01_07_1398.bin
mkinitramfs runs modinfo -F firmware i915 which only lists the following files: dmc_ver1_ 07.bin dmc_ver1_ 26.bin dmc_ver1_ 01.bin guc_ver6_ 1.bin huc_ver02_ 00_1810. bin huc_ver01_ 07_1398. bin huc_ver01_ 07_1398. bin
i915/bxt_
i915/skl_
i915/kbl_
i915/skl_
i915/kbl_
i915/bxt_
i915/skl_