Use floating point math when calculating BOOT_FREQ_MULT
Use floating point math when calculating BOOT_FREQ_MULT

Change-Id: I830d9b9ed05dcc661c93ab7d3df156995113b393
CQ:SW381082
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40427
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Reviewed-by: William G. Hoffa <7dd6aa5e78423995d9d7c7ecada5b77ee07f88cc@us.ibm.com>
Reviewed-by: Matthew A. Ploetz <9c4e62337697f225e3360ddd1441dbba069477f9@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot