power: fix build with libvirt

Following moving rte_power_guest* API from the power library to the
kvm_vm driver, the symbols are not exposed anymore, since the library
hosting them is the kvm_vm dri

power: fix build with libvirt

Following moving rte_power_guest* API from the power library to the
kvm_vm driver, the symbols are not exposed anymore, since the library
hosting them is the kvm_vm driver binary.

Finish this cleanup by hosting the rte_power_guest_channel.h header in
the driver, then version the symbols and add corresponding build
dependencies in the vm_power_manager example.

Fixes: 6f987b594fa6 ("power: refactor core power management")

Signed-off-by: David Marchand <david.marchand@redhat.com>

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power: refactor core power management

This patch introduces a comprehensive refactor to the core power
management library. The primary focus is on improving modularity
and organization by relocating

power: refactor core power management

This patch introduces a comprehensive refactor to the core power
management library. The primary focus is on improving modularity
and organization by relocating specific driver implementations
from the 'lib/power' directory to dedicated directories within
'drivers/power/*'. The adjustment of meson.build files
enables the selective activation of individual drivers.

These changes contribute to a significant enhancement in code
organization, providing a clearer structure for driver implementations.
The refactor aims to improve overall code clarity and boost
maintainability. Additionally, it establishes a foundation for
future development, allowing for more focused work on individual
drivers and seamless integration of forthcoming enhancements.

Signed-off-by: Sivaprasad Tummala <sivaprasad.tummala@amd.com>
Acked-by: Huisong Li <lihuisong@huawei.com>

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