ramdisk+AnyKernel2: synapse and bootscript updates/fixes
Synapse:
- fix minor zram control issue
- remove Multi Core Power Saving since it's always been broken on tuna, and being removed from the kernel source by Smitty

dvbootscript:
- only enable KSM by default on SmittyV
- add barrier=0 to fstab, since is now supported in the kernel, and add it to userdata workarounds list for potential issues with old init binaries (was definitely an issue on ext4)