s390: remove kvm_types.h from Kbuild

s390: remove kvm_types.h from Kbuild

kvm_types.h is mandatory in include/asm-generic/Kbuild so having it
in another Kbuild file causes a warning. Remove it from the arch/
Kbuild file to fix the warning.

../scripts/Makefile.asm-headers:39: redundant generic-y found in ../arch/s390/include/asm/Kbuild: kvm_types.h

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260203184204.1329414-1-rdunlap@infradead.org