drivers/char/ipmi: Use KCS_IDLE_STATE

KCS_IDLE and KCS_IDLE state have the same value, but in this function the
constants ending in _STATE are compared to the state variable.

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Core Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Naresh Bhat <nbhat@mvista.com>

# Please enter the commit message for your changes. Lines starting
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# Author:    Julia Lawall <julia@diku.dk>
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#       modified:   drivers/char/ipmi/ipmi_kcs_sm.c
#
~