ramdisk+AnyKernel2: fix fstab mount options, bootscript fixes
- remove faulty errors=panic option causing hung boots on f2fs
- reorder f2fs options per mount output
- remove no longer needed ext4 workaround from bootscript and add the
(now working!) options back to the fstab
- clean up no longer used LMK donotkill commands from bootscript