ipmi: kcs_bmc: don't change device name

kcs_bmc_alloc(...) calls dev_set_name(...) which is incorrect as most
bus driver frameworks, platform_driver in particular, assume that they
are able to set the device name themselves.

Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>