Update kernel submodule (#10411)

Update sonic-linux-kernel submodule to updated 202012 branch. This brings in the following commits....

```
e97f9fc [202012] Add upstreamed patches which backport support for registers for CPLD PNs (#275)
58abcdc Merge pull request #267 from Staphylo/202012-log-buf-len
3f16f4f Merge pull request #268 from Staphylo/202012-emmc-fixes
a120ae7 Apply kernel patches to fix emmc unreliability
5f4a3f3 Increase log_buf_len to 1M for all architecture
```
This commit is contained in:
Alexander Allen 2022-04-03 14:42:41 -04:00 committed by GitHub
parent a081d04807
commit 01acd72314
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@ -1 +1 @@
Subproject commit 15e6f4b0a0bad2c989acb1acea8527188a67fb7a
Subproject commit e97f9fc797b03bbcc94d0a28dc2fe538554691f6