MX6: Correct calculation of PLL_SYS

DIV_SELECT is used as Fout = Fin * div_select / 2.0, so we should do
the shift after the multiply to avoid rounding errors

Signed-off-by: Andre Renaud <andre@bluewatersys.com>

arch/arm/cpu/armv7/mx6/clock.c

@@ -80,7 +80,7 @@ static u32 decode_pll(enum pll_clocks pll, u32 infreq)
 		div = __raw_readl(&imx_ccm->analog_pll_sys);
 		div &= BM_ANADIG_PLL_SYS_DIV_SELECT;
 
-		return infreq * (div >> 1);
+		return (infreq * div) >> 1;
 	case PLL_BUS:
 		div = __raw_readl(&imx_ccm->analog_pll_528);
 		div &= BM_ANADIG_PLL_528_DIV_SELECT;