[U-Boot] Illegal use of FP ops in clock_ti814x.c

[Wolfgang Denk <wd@denx.de>]

Dear Matt,

I hope you are the right person to address this to - if not, please
help to redirect to the current responsible developer.

Function pll_sigma_delta_val() in arch/arm/cpu/armv7/am33xx/clock_ti814x.c
incorrectly uses "float" data, which results in FP operations which
are not permitted in U-Boot.

The actual computation appears simple enough so a rewrite of the code
without using any floating point operations should be fairly easy, but
I don't understand the actual logic of this code, so I'd rather leave
this to someone who does.

Could you please help and clean up these three lines of code?

Thanks in advance.

Best regards,

Wolfgang Denk

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