ASoC: wcd-dsp-mgr: add support for collecting memory dumps

The codec driver is notified through interrupt whenever the
DSP in codec is unresponsive/crashed. In such cases, collecting
dumps of the codec memory is useful in debugging the issues.
Change adds support in the wcd dsp manager driver to collect
the memory dumps upon notification of error interrupt.

Change-Id: Ib91cd4fc1476ee1a9ec448cde1a083070443f726
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>