Update docs for some new modules (#2454)

docs/api/python/contrib.rst

@@ -77,6 +77,11 @@ tvm.contrib.rocm
 .. automodule:: tvm.contrib.rocm
     :members:
 
+tvm.contrib.sparse
+~~~~~~~~~~~~~~~~~~
+.. automodule:: tvm.contrib.sparse
+    :members:
+
 
 tvm.contrib.spirv
 ~~~~~~~~~~~~~~~~~

docs/api/python/relay/frontend.rst

@@ -5,3 +5,7 @@ tvm.relay.frontend
 .. automodule:: tvm.relay.frontend
 
 .. autofunction:: tvm.relay.frontend.from_mxnet
+
+.. autofunction:: tvm.relay.frontend.from_keras
+
+.. autofunction:: tvm.relay.frontend.from_onnx

docs/api/python/topi.rst

@@ -144,6 +144,11 @@ topi.image
 ~~~~~~~~~~
 .. autofunction:: topi.image.resize
 
+topi.sparse
+~~~~~~~~~~~
+.. autofunction:: topi.sparse.csrmv
+.. autofunction:: topi.sparse.csrmm
+.. autofunction:: topi.sparse.dense
 
 topi.generic
 ~~~~~~~~~~~~