soc: qcom: socinfo: populate arch_read_hardware_id

Populate arch_read_hardware_id with msm specific implementation
to report correct hardware id under /proc/cpuinfo.

Change-Id: Ief215bded1eeb42422236d81adeab4df90c0e995
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>