ipmi: Remove the now unused priority from SMI sender

Since the queue was moved into the message handler, the priority
field is now irrelevant.

Signed-off-by: Corey Minyard <cminyard@mvista.com>

diff --cc drivers/char/ipmi/ipmi_msghandler.c
Simple merge

diff --cc drivers/char/ipmi/ipmi_si_intf.c
Simple merge

diff --cc include/linux/ipmi_smi.h
Simple merge