Refactor initialization of micro-kernel parameters

Move initialization of micro-kernel parameters from requantization.h to
params-init.h. Most parameters have nothing to do with requantization, and were
initialized in this header just for historical reasons.

PiperOrigin-RevId: 276791878
diff --git a/src/xnnpack/operator.h b/src/xnnpack/operator.h
index 9b1253a..8f7f476 100644
--- a/src/xnnpack/operator.h
+++ b/src/xnnpack/operator.h
@@ -13,7 +13,7 @@
 
 #include <pthreadpool.h>
 
-#include <xnnpack/requantization.h>
+#include <xnnpack/params.h>
 #include <xnnpack/compute.h>