FROMLIST: KVM: arm64: Unify identifiers used to distinguish host and hypervisor

The 'pkvm_component_id' enum type provides constants to refer to the
host and the hypervisor, yet this information is duplicated by the
'pkvm_hyp_id' constant.

Remove the definition of 'pkvm_hyp_id' and move the 'pkvm_component_id'
type definition to 'mem_protect.h' so that it can be used outside of
the memory protection code, for example when initialising the owner for
hypervisor-owned pages.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20221020133827.5541-6-will@kernel.org


Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Change-Id: I78454dc315a0993808a741ebd7fabf9dbcaf09bc
Signed-off-by: Quentin Perret <qperret@google.com>