audio: crossover: use size_t for the proc-func lookup counter

Change the loop counter in the processing-function lookup helpers from
int to size_t so it matches crossover_proc_fncount and avoids a
signed/unsigned comparison.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

Author: softwarecki

src/audio/crossover/crossover.h

@@ -87,10 +87,9 @@ extern const size_t crossover_proc_fncount;
 /**
  * \brief Returns Crossover processing function.
  */
-static inline crossover_process_func
-	crossover_find_proc_func(enum sof_ipc_frame src_fmt)
+static inline crossover_process_func crossover_find_proc_func(enum sof_ipc_frame src_fmt)
 {
-	int i;
+	size_t i;
 
 	/* Find suitable processing function from map */
 	for (i = 0; i < crossover_proc_fncount; i++)
@@ -103,10 +102,9 @@ static inline crossover_process_func
 /**
  * \brief Returns Crossover passthrough functions.
  */
-static inline crossover_process_func
-	crossover_find_proc_func_pass(enum sof_ipc_frame src_fmt)
+static inline crossover_process_func crossover_find_proc_func_pass(enum sof_ipc_frame src_fmt)
 {
-	int i;
+	size_t i;
 
 	/* Find suitable processing function from map */
 	for (i = 0; i < crossover_proc_fncount; i++)