[submodule] Advance sonic-linux-kernel pointer (sonic-net#13558)

Update sonic-linux-kernel submodule pointer to include the following:
* 4873ade Merge pull request 303 from ([#adhava28/cisco/kernel_confi](https://github.com/sonic-net/sonic-linux-kernel/pull/adhava28/cisco/kernel_confi))
* 19266b4 Review comments ([#ncorporate](https://github.com/sonic-net/sonic-linux-kernel/pull/ncorporate))
* f28140c Merge branch 'master' into ([#isco/kernel_confi](https://github.com/sonic-net/sonic-linux-kernel/pull/isco/kernel_confi))
* 5717c5d Merge pull request 300 from ([#aiarcot895/fix-config-setting-with-existing-value](https://github.com/sonic-net/sonic-linux-kernel/pull/aiarcot895/fix-config-setting-with-existing-value))
* 18a0bf7 Kernel configuration is enabled to support device drivers for sensor devices, gpio devices, MDIO mux devices, ADC, DAC device and Intel SPI ([#ontroller](https://github.com/sonic-net/sonic-linux-kernel/pull/ontroller))
* 7f8d898 Support verifying the value of strings (and not just y/m/n ([#ettings](https://github.com/sonic-net/sonic-linux-kernel/pull/ettings))
* e9206c9 Fix setting a config with an already-existing conflicting ([#alu](https://github.com/sonic-net/sonic-linux-kernel/pull/alu))

Signed-off-by: dprital <[email protected]>