[sonic-platform-daemons] submodule update

c4d4790 [xcvrd] refactor Y-Cable firmware information to conform with all vendors (sonic-net#171)
be7f4e1 [voqinband]Support for inband port as regular port (sonic-net#145)
eff5c1c [thermalctld] No need exit thermalcltd when loading invalid policy file (sonic-net#172)
5b6d9c0 [syseepromd] Add unit tests; Refactor to allow for greater unit test coverage (sonic-net#156)

Signed-off-by: vaibhav-dahiya <vdahiya@microsoft.com>