cannot get frequency from cpuinfo_cluster or cpuinfo_core

[wanglxchina]

Frequency is not assigned in the cpuinfo_arm_inux_int function from the cpuinfo/src/arm/Linux/int. c file, causing the inability to obtain frequency through cpuinfo_cluster or cpuinfo_core. Is this intentional or is it missing?

[atusnr]

PR #152 might be fixing this issue.