Remove include <log.h> from defines.h

The reason for this is that log.h includes drv_hrt.h which sucks in
half the project's include files with it, which causes strange build
issues

src/lib/geo/geo.h

@@ -48,6 +48,8 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#include <drivers/drv_hrt.h>
+
 #include <lib/mathlib/mathlib.h>
 #include <lib/matrix/matrix/math.hpp>