Fix UEFI build on FreeBSD by not including system headers
CLA: trivial
#if defined(__linux)
# include <asm/unistd.h>
#endif
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) && !defined(OPENSSL_SYS_UEFI)
# include <sys/types.h>
# include <sys/sysctl.h>
# include <sys/param.h>
