[MSLITE][Develop] deconv fp16 bug

mindspore/lite/nnacl/assembly/fp16/MatmulFp16.S

@@ -24,8 +24,8 @@ MatmulFp16Neon64:
   st1 {v8.8h, v9.8h, v10.8h, v11.8h}, [sp], #64
   st1 {v12.8h, v13.8h, v14.8h, v15.8h}, [sp], #64
 
-  mov w18, #16 // sizeof(float) * 8
-  mul w15, w5, w18 // block stride of lhs/rhs: sizeof(float) * 8 * depth
+  mov w18, #16 // sizeof(float16) * 8
+  mul w15, w5, w18 // block stride of lhs/rhs: sizeof(float16) * 8 * depth
   mov x11, x3 // bias flag
   mov x18, #2
   ldr x17, [sp]
@@ -57,7 +57,7 @@ L2:
   dup v30.4s, wzr
   dup v31.4s, wzr
 
-  cmp w13, #4
+  cmp w13, #8
   blt CommLoopMul
 
 OptLoopMul8: