if(waffle_has_wayland OR waffle_has_x11_egl OR waffle_has_gbm OR
   waffle_has_surfaceless_egl)
    set(waffle_has_egl TRUE)
else(waffle_has_wayland OR waffle_has_x11_egl)
    set(waffle_has_egl FALSE)
endif()

if(waffle_has_glx OR waffle_has_x11_egl)
    set(waffle_has_x11 TRUE)
else()
    set(waffle_has_x11 FALSE)
endif()

if(waffle_has_wayland OR waffle_has_x11_egl OR waffle_has_gbm OR
   waffle_has_surfaceless_egl)
    set(waffle_has_egl TRUE)
else()
    set(waffle_has_egl FALSE)
endif()

if(waffle_has_glx OR waffle_has_x11_egl)
    set(waffle_has_x11 TRUE)
else()
    set(waffle_has_x11 FALSE)
endif()

Drop condition expresion in 'else' statement
cmake: Drop condition expresion in 'else' statement

CMake ignores the condition, so it's just misleading cruft.

git-grep claimed only one 'else' statement existed in the codebase.

Suggested-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
