KVM: arm64: Improve out-of-order sysreg table diagnostics

KVM: arm64: Improve out-of-order sysreg table diagnostics

Adding new entries to our system register tables is a painful exercise,
as we require them to be ordered by Op0,Op1,CRn,CRm,Op2.

If an entry is misordered, we output an error that indicates the
pointer to the entry and the number *of the last valid one*.

That's not very helpful, and would be much better if we printed the
number of the *offending* entry as well as its name (which is present
in the vast majority of the cases).

This makes debugging new additions to the tables much easier.

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20240410152503.3593890-1-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>