KVM: Move prototypes for MMU notifier callbacks to generic code

mainline inclusion
from mainline-v5.13-rc1
commit 5f7c292b
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I7S3VQ
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5f7c292b8975c9146063abbb91c0b9cdc1a5e9c5



Also, use the common declaration of kvm_unmap_hva_range() for loongarch,
instead of a private one. And change the definition for it.

Previously, loongarch's version of kvm_unmap_hva_range() defined "bool
blockable" as its last parameter(which is not used). But it is wrong.
KVM MMU uses "flag" of struct mmu_notifier_range as the argument when
it calls kvm_unmap_hva_range(), the arch code should use

	if (flag & MMU_NOTIFIER_RANGE_BLOCKABLE)

inside kvm_unmap_hva_range() when it wanna know if current operation
is a blockable one. So just fix the broken syntax for loongarch.

----------------------------------------------------------------------

Move the prototypes for the MMU notifier callbacks out of arch code and
into common code.  There is no benefit to having each arch replicate the
prototypes since any deviation from the invocation in common code will
explode.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210326021957.1424875-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

conflict:
	include/trace/events/kvm.h

Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>