[ci] Fix condtional checks
[ci] Fix condtional checks

Triggering condition was C/C++ lint and include guard check was the
inverse of what is should be. So the check triggered when it wasn't
needed and vice-versa

Signed-off-by: Greg Chadwick <3e4c3d6d87c017d1a2fa161477653b4039c6b2fb@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan