[202012][submodule] Advance sonic-linux-kernel pointer (#11406)

Update sonic-linux-kernel submodule pointer to include the following:
* [202012][patch] mlxsw: i2c: Prevent transaction execution for special chip states ([#282](sonic-net/sonic-linux-kernel#282))

Signed-off-by: dprital <drorp@nvidia.com>

Author: dprital