FT_BALANCED_READ_MODE incorrectly detected

Detected during installation of reactos-bootcd-0.4.15-dev-5632-g684b5ce-x86-gcc-lin-dbg

(drivers/storage/port/scsiport/ioctl.c:542) unknown ioctl code: 0x66001B 

IOCTL 0x66001B corresponds to FT_BALANCED_READ_MODE

This is called in ntoskrnl/fsrtl/faulttol.c by FsRtlBalanceReads : https://git.reactos.org/?p=reactos.git;a=blob;f=ntoskrnl/fsrtl/faulttol.c;hb=64527aa94823264d30bceb604f65d8a15f1ad6cd#l46

but leading to an "unsupported" IOCTL in ScsiPortDeviceControl : https://git.reactos.org/?p=reactos.git;a=blob;f=drivers/storage/port/scsiport/ioctl.c#l404

Expected result : this should lead to a dedicated "case" item, even with "UNIMPLEMENTED;" for the time being.

Patch IOCTL.patchtested succesfully against this case.