Revert "Audio: SRC: Replace mod_alloc with mod_balloc in rballoc usage"

This reverts commit 49f7b79. Commit
9fcc269 ("Audio: SRC: All memory allocations through module") to
which it's referring wasn't wrong, the delay_lines buffer in SRC must
also be allocated on the module heap to be accessible in the DP
userspace mode.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

src/audio/src/src_common.c

@@ -533,7 +533,7 @@ int src_params_general(struct processing_module *mod,
 	/* free any existing delay lines. TODO reuse if same size */
 	mod_free(mod, cd->delay_lines);
 
-	cd->delay_lines = mod_balloc(mod, delay_lines_size);
+	cd->delay_lines = mod_alloc(mod, delay_lines_size);
 	if (!cd->delay_lines) {
 		comp_err(dev, "failed to alloc cd->delay_lines, delay_lines_size = %zu",
 			 delay_lines_size);