85xx: Round up frequency calculations to get reasonable output
eg. because of rounding error we can get 799Mhz instead of 800Mhz. Introduced DIV_ROUND_UP and roundup taken from linux kernel. Signed-off-by: NDejan Minic <minic@freescale.com> Signed-off-by: NSrikanth Srinivasan <srikanth.srinivasan@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Acked-by: NAndy Fleming <afleming@freescale.com>
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