Commit 
be1859bdc660 ("initramfs: remove redundant dependency on
BLK_DEV_INITRD") removed all redundant dependencies on BLK_DEV_INITRD,
but the recent addition of zstd support introduced a new one.
Fixes: a30d8a39f057 ("usr: Add support for zstd compressed initramfs")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 
 config RD_ZSTD
        bool "Support initial ramdisk/ramfs compressed using ZSTD"
        default y
-       depends on BLK_DEV_INITRD
        select DECOMPRESS_ZSTD
        help
          Support loading of a ZSTD encoded initial ramdisk or cpio buffer.