[PATCH v2] efi: fix for_each_efi_memory_desc_in_map() for empty memmaps

Commit 78ce248faa3c ("efi: Iterate over efi.memmap in for_each_efi_memory_desc()") introduced a regression for systems booted with 'noefi' kernel option. In particular, I observe early kernel hang in efi_find_mirror() on for_each_efi_memory_desc() call. As we don't have efi memmap we enter this

[PATCH v2] efi: fix for_each_efi_memory_desc_in_map() for empty memmaps

Commit 78ce248faa3c ("efi: Iterate over efi.memmap in for_each_efi_memory_desc()") introduced a regression for systems booted with 'noefi' kernel option. In particular, I observe early kernel hang in efi_find_mirror() on for_each_efi_memory_desc() call. As we don't have efi memmap we enter this