protocol: Correct typo 'suppot'
protocol: Correct typo 'suppot'

Signed-off-by: Bryce Harrington <dd437fc32dcda8cbb48d47baa844ad777493d02b@samsung.com>

kwm81/weston,sir-murray/weston,xorgy/weston,sir-murray/weston,krezovic/weston,Tarnyko/weston-xdg_surface_present,giucam/weston,Gnurou/weston,mchalupa/weston,udoprog/weston,kwm81/weston,Fantu/compositor-spice,Tarnyko/weston-xdg_surface_present,eyolfson/weston,eyolfson/weston,Fantu/compositor-spice,mchalupa/weston,Fantu/compositor-spice,giucam/weston,udoprog/weston,krezovic/weston,jonnylamb/weston,jonnylamb/weston,xorgy/weston,Gnurou/weston