Staging: bmc: fix coding style warning

This is a patch to the vendorspecificextn.c that fixes coding style
warning message line over 80 characters found by checkpatch.pl script.
I am submitting this patch as required by Eudyptula Challenge.

Signed-off-by: Ramesh Basukala <basukalaramesh@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>