Restore the JPP() and JMETHOD() macros.  Even though libjpeg-turbo doesn't use them anymore, other software apparently does:
https://bugzilla.redhat.com/show_bug.cgi?id=1164815
https://bugs.kde.org/show_bug.cgi?id=340944
https://bugzilla.mozilla.org/show_bug.cgi?id=1093615


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1431 632fc199-4ca6-4c93-a231-07263d6284db
Some software also needs the FAR macro.  Ugh.  Also wordsmithing.


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1433 632fc199-4ca6-4c93-a231-07263d6284db
Fix build when INPUT_SMOOTHING_SUPPORTED is undefined

git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1434 632fc199-4ca6-4c93-a231-07263d6284db
Remove unused code

git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1436 632fc199-4ca6-4c93-a231-07263d6284db