s390/dis: use correct escape sequence for '%' character
The double escape character sequence introduced with commit
f3395b260c71 ("s390/dis: Fix handling of format specifiers") is not
necessary anymore since commit
d9433fb2041e ("s390/dis: Fix printing
of the register numbers").
Instead this now generates an extra '%' character:
lg %%r1,160(%%r11)
So fix this and basically revert
f3395b260c71.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>