softfloat: remove HPPA specific code
We don't have any HPPA target, so let's remove HPPA specific code. It can be re-added when someone adds an HPPA target. This has been blessed by Stuart Brady <sdb@zubnet.me.uk>, author of the target-hppa fork. Reviewed-by: NPeter Maydell <peter.maydell@linaro.org> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
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