KVM: arm64: Advertise ID_AA64PFR0_EL1.CSV2/3 to protected VMs

[ Upstream commit e8162521 ]

The existing pKVM code attempts to advertise CSV2/3 using values
initialized to 0, but never set. To advertise CSV2/3 to protected
guests, pass the CSV2/3 values to hyp when initializing hyp's
view of guests' ID_AA64PFR0_EL1.

Similar to non-protected KVM, these are system-wide, rather than
per cpu, for simplicity.

Fixes: 6c30bfb1

 ("KVM: arm64: Add handlers for protected VM System Registers")
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://lore.kernel.org/r/20230404152321.413064-1-tabba@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Sasha Levin <sashal@kernel.org>