soc: qcom: provide apis for pcode and feature string

Socinfo need to provide pcode and feature string information
to client drivers.

Change-Id: I7a9ce09803ea855a94591ef85003a67b81a70230
Signed-off-by: Prasad Sodagudi <quic_psodagud@quicinc.com>
Signed-off-by: Saranya R <quic_sarar@quicinc.com>