cpu-topology: Change the size of allocation for cpu's raw_capacity

Allocating raw_capacity nodes as per max possible cpus gives issues
when there are cores in between which are not available. Allocate as 
many elements for holding raw_capacity as is last set bit position
in possible mask.

Change-Id: I90055f96c320b15960efac10d8d92c69413eeb6b
Signed-off-by: Avaneesh Kumar Dwivedi <quic_akdwived@quicinc.com>