Do not use mkf2fsuserimg.sh if we have two fs in fstab, for example:

/dev/block/platform/msm_sdcc.1/by-name/cache        /cache          ext4    noatime,nosuid,nodev,barrier=1,data=ordered                     wait,check
/dev/block/platform/msm_sdcc.1/by-name/cache        /cache          f2fs    flush_merge,noatime,background_gc=off,inline_xattr,active_logs=2                     wait,check
/dev/block/platform/msm_sdcc.1/by-name/userdata     /data           ext4    noatime,nosuid,nodev,barrier=1,data=ordered,noauto_da_alloc     wait,check,encryptable=/dev/block/platform/msm_sdcc.1/by-name/encrypt
/dev/block/platform/msm_sdcc.1/by-name/userdata     /data           f2fs    flush_merge,noatime,background_gc=off,inline_xattr,active_logs=2     wait,check,encryptable=/dev/block/platform/msm_sdcc.1/by-name/encrypt

(cherry picked from commit 677998cade56f733b08dd81c2e6551fb8bff2c17)