replace all endless for loops by while

cpu/lpc2387/mci/lpc2387-mci.c

examples/rpl_udp/udp.c

sys/crypto/aes/aes.c

sys/net/ccn_lite/ccnl-core.c

sys/net/ccn_lite/ccnl-ext-mgmt.c

sys/semaphore/semaphore.c