xlat: update KVM_CAP_* constants

xlat: update KVM_CAP_* constants

* xlat/clone_flags.in (KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2): New
constant introduced by Linux kernel commit v5.2-rc1~17^2~11.
(KVM_CAP_PPC_IRQ_XIVE): New constant introduced by Linux kernel commits
v5.2-rc1~17^2~2^2~19 and v5.2-rc1~17^2~2.
(KVM_CAP_ARM_SVE): New constant introduced by Linux kernel commit
v5.2-rc1~17^2~1^2~31.
(KVM_CAP_ARM_PTRAUTH_ADDRESS, KVM_CAP_ARM_PTRAUTH_GENERIC): New
constants introduced by Linux kernel commits v5.2-rc1~17^2~1^2~10
and v5.2-rc1~17^2~1.
* NEWS: Mention this.