[S390] add z9-ec/z10 instruction to kernel disassembler

Add the instruction of the z9-ec and z10 machines to the kernel disassembler.
Add the missing "ptff" instruction of z9-109 and the missing "sqd" of g5.
Remove useless comments with instruction examples from format table.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>