!12668 [GPU] fix index_add incorrect shape constraint

From: @tom__chen
Reviewed-by: 
Signed-off-by:

mindspore/ops/operations/math_ops.py

@@ -4397,10 +4397,10 @@ class MatrixInverse(PrimitiveWithInfer):
 
 class IndexAdd(PrimitiveWithInfer):
     """
-    Adds tenosr y to specified axis and indices of tensor x.
+    Adds tensor y to specified axis and indices of tensor x.
 
     Args:
-        axis (int): The dimension along wich to index.
+        axis (int): The dimension along which to index.
 
     Inputs:
         - **input_x** (Tensor) - The input tensor to add to, with data type float64, float32, float16, int32, int16,
@@ -4453,8 +4453,6 @@ class IndexAdd(PrimitiveWithInfer):
         validator.check_int_range(self.axis, -x_rank - 1, x_rank, Rel.INC_BOTH, 'axis', self.name)
         axis = self.axis if self.axis >= 0 else x_rank + self.axis
         for dim in range(x_rank):
-            if dim == axis:
-                validator.check('x dim %d' % dim, x_shape[dim], "y dim %d" % dim, y_shape[dim], Rel.GE, self.name)
-            else:
+            if dim != axis:
                 validator.check('x dim %d' % dim, x_shape[dim], "y dim %d" % dim, y_shape[dim], Rel.EQ, self.name)
         return x_shape