coresight: csr: Add multiple CSR devices support

Add a CSR device list in CSR driver to support multiple CSR devices. CSR
device structure is initialized in probe and added to the list. Add CSR
device structure as parameter of CSR function. Change the caller of CSR
functions to align with this change.

Change-Id: I15e979a517204ac37dbcc5defd78a0214f44ade8
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>