[Code generation] Added StreamingFCLayer_Batch class to layers.py and its init function

src/finn/backend/fpgadataflow/layers.py

+class StreamingFCLayer_Batch():
+    def __init__(self, node, model):
+        # Layer attributes
+        num_attr = len(node.attribute)
+        for k in range(num_attr):
+            if node.attribute[k].name == "PE":
+                self.PE = node.attribute[k].i
+            if node.attribute[k].name == "SIMD":
+                self.SIMD = node.attribute[k].i
+            if node.attribute[k].name == "MH":
+                self.MH = node.attribute[k].i
+            if node.attribute[k].name == "MW":
+                self.MW = node.attribute[k].i
+            if node.attribute[k].name == "resDataType":
+                self.resDataType = node.attribute[k].s.decode("utf-8")
+            if node.attribute[k].name == "resType":
+                self.resType = node.attribute[k].s.decode("utf-8")
+        
+        # get other parameters
+        weights_shape = model.get_tensor_shape(node.input[1])
+        thresholds_shape = model.get_tensor_shape(node.input[2])
+        self.WMEM = weights_shape[2]
+        self.TMEM = thresholds_shape[0]
+        self.API = thresholds_shape[2]
+
+    def get_PE(self):
+        return self.PE
+
+    def get_SIMD(self):
+        return self.SIMD
+
+    def get_MH(self):
+        return self.MH
+
+    def get_MW(self):
+        return self.MW
+
+    def get_resDataType(self):
+        return self.resDataType
+
+    def get_resType(self):
+        return self.resType
+
+    def get_WMEM(self):
+        return self.WMEM
+
+    def get_TMEM(self):
+        return self.TMEM
+
+    def get_API(self):
+        return self.API
+
+
+
+