Implement ioctl command 0x01f30003.

Wonder if this will fix anything, it was silently not reading before.
Implement ioctl command 0x01f100a6.
Correct result for sceIoRead type ioctls.
Implement ioctl command 0x01d20001.
Add Ioctl() to IFileSystem, cleaner.
Implement ioctl command 0x01020002.
Improve sceIoGetDevType() return values.

At least for block/file devices.  Can't find a way to get an alias.
Remove extraneous lookup.
Merge pull request #4887 from unknownbrackets/io-minor

Implement a few more ioctl commands