topology: add sof_ipc_comp_smart_amp struct

Add SOF_COMP_SMART_AMP type for smart amp component.
Basic topology using smart amplifier component
could be as follows:

                +------------------------------------------+
    +------+    | +---+  +-------------+  +---+  +-------+ |
    | Host |----->|Buf|->|  Smart Amp  |->|Buf|->|SSP Dai|-----------+
    +------+    | +---+  +-------------+  +---+  +-------+ |         |
                +-----------------^------------------------+         |
                                  |                                  |
                                +---+                                |
                                |Buf|                                |
                                +---+                                |
                                  ^                                  |
                +-----------------|--------------------------+       |
    +------+    | +---+  +--------|------+  +---+  +-------+ |       |
    | Host |<-----|Buf|<-|     Demux     |<-|Buf|<-|SSP Dai|<--------+
    +------+    | +---+  +---------------+  +---+  +-------+ |
                +--------------------------------------------+

Basic topology contains Smart Amp component in playback pipeline and Demux
component in capture pipeline. There is a additional buffer (feedback)
between them in order to process "feedback".

Signed-off-by: Bartosz Kokoszko <bartoszx.kokoszko@linux.intel.com>

Author: bkokoszx

src/include/ipc/topology.h

@@ -46,6 +46,7 @@ enum sof_comp_type {
 	SOF_COMP_DEMUX,
 	SOF_COMP_ASRC,		/**< Asynchronous sample rate converter */
 	SOF_COMP_DCBLOCK,
+	SOF_COMP_SMART_AMP,		/**< smart amplifier component */
 	/* keep FILEREAD/FILEWRITE as the last ones */
 	SOF_COMP_FILEREAD = 10000,	/**< host test based file IO */
 	SOF_COMP_FILEWRITE = 10001,	/**< host test based file IO */