KVM: arm64: Move FPMR into the sysreg array

Just like SVCR, FPMR is currently stored at the wrong location.

Let's move it where it belongs.

Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240820131802.3547589-4-maz@kernel.org


Signed-off-by: Marc Zyngier <maz@kernel.org>