powerpc: Display processor virtualization resource allocs in lparcfg

This patch updates the output from /proc/ppc64/lparcfg to display the
processor virtualization resource allocations for a shared processor
partition.

This information is already gathered via the h_get_ppp call, we just
have to make sure that the ibm,partition-performance-parameters-level
property is >= 1 to ensure that the information is valid.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>