ipmi: Replace incorrect dependency on ipmibt with ipmimsg
ipmi: Replace incorrect dependency on ipmibt with ipmimsg

No symbols from ipmibt.H were required, but some from ipmimsg.H were.

Change-Id: I9730670b5c2686cbf3f55e2b52e91ded3d78cfb0
Signed-off-by: Andrew Jeffery <f8d12726b50f34e506b99227014c92d61d1be0a5@au1.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/65935
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: Jenkins OP HW <0eb0fff262f74a65a832afbcc7b153e391c9a3fd@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Corey V. Swenson <6b585c7446d4a0351ef146912eaabcae3d9a2e28@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot