[igemm] fix xdlop wrw padding kernel

[asleepzzz]

fix
./bin/MIOpenDriver conv -F 4 -n 120 -c 510 -H 5 -W 5 -k 250 -y 3 -x 3 -p 1 -q 1 -u 1 -v 1 -l 1 -j 1 -g 1 -t 1
this patch is not fixing nan issue

[daniellowell]

Then what does it do?

[asroy]

Then what does it do?

It fix an issue uncovered when testing http://ontrack-internal.amd.com/browse/SWDEV-258337

[codecov]

Codecov Report

Merging #563 into develop will decrease coverage by 0.02%.
The diff coverage is 31.96%.

@@             Coverage Diff             @@
##           develop     #563      +/-   ##
===========================================
- Coverage    52.20%   52.18%   -0.03%     
===========================================
  Files          297      298       +1     
  Lines        46061    46046      -15     
===========================================
- Hits         24047    24028      -19     
- Misses       22014    22018       +4     

Impacted Files	Coverage Δ
src/include/miopen/conv/asm_implicit_gemm.hpp	0.00% <0.00%> (ø)
src/include/miopen/generic_search.hpp	0.00% <0.00%> (ø)
src/include/miopen/solver.hpp	15.08% <ø> (+1.03%)	⬆️
..._hip_implicit_gemm_wrw_v4r4_xdlops_padded_gemm.cpp	0.52% <0.00%> (ø)
src/solver/conv_multipass_wino3x3WrW.cpp	2.12% <ø> (ø)
test/conv_common.hpp	60.18% <ø> (ø)
.../conv_asm_implicit_gemm_wrw_gtc_dynamic_xdlops.cpp	1.47% <1.92%> (ø)
src/solver/conv_asm_implicit_gemm_gtc_bwd.cpp	3.41% <2.00%> (-0.09%)	⬇️
src/solver/conv_asm_implicit_gemm_gtc_fwd.cpp	4.76% <3.33%> (+0.11%)	⬆️
src/ocl/convolutionocl.cpp	58.39% <66.66%> (ø)
... and 4 more

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[asroy]

#568 should be able fix the issue, so this PR is no longer needed