bfd: remove use of INLINE

[Andreas Schwab]

On Okt 28 2021, Alan Modra via Binutils wrote:

> No need to use anything fancy, plain inline works just as well.

We might even drop inline when used together with static, since the
compiler can (and does) already inline without that.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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