Only check for serial control line conflicts if PTT shares CAT port
Fix Ten-Tec Orion get/set split functions

The get_split_vfo function was returning inverted results.

The set_split_vfo function was ignoring the split argument!
Icom IC-7410 has VFO A/B not MAIN/SUB
Added IC-7410 data modes
Merge branch 'serial-contro-line-error-fix'

of git://git.code.sf.net/u/bsomervi/hamlib
Merge branch 'fix-tt-orion-get-split'

of git://git.code.sf.net/u/bsomervi/hamlib
Merge branch 'ic-7410-vfos'

of git://git.code.sf.net/u/bsomervi/hamlib