add success checks in packet handler config
enable pullups on gpios
add code to customize irq enabling
setup rx_start to go back to rx on rx timeout.
display more int status

also fix upper half ioctl

drivers/wireless/ieee802154/Make.defs
    Changes to the build infrastructure to include the mrf24j40 driver

include/nuttx/spi/spi.h
    Define a IEEE SPI device

include/nuttx/wireless/ieee802154/ieee802154_radio.h
    This file defines the API of a IEEE 802.15.4 radio device, to be used by the future common MAC 802.15.4 layer

drivers/wireless/ieee802154/mrf24j40.c
drivers/wireless/ieee802154/mrf24j40.h
    The main MRF24J40 IEEE 802.15.4 radio driver

include/nuttx/wireless/ieee802154/mrf24j40.h
    This file allows instanciation of the MRF24j40 driver from board configurations

Move the remaining files from include/nuttx/net/uip to include/nuttx/net; Rename *_internal.h header files in net/ to just *.h

Eliminated sam3u_internal.h. Use separate header files instead.  More renaming from sam3u_ to sam_ to make room in the namespce for the sam4l_

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5534 42af7a65-404d-4744-a932-0658087f49c3

Rename LM3S files, variables, and types from lm3s_ to lm_; Rename configuration variables from CONFIG_LM3S_ to CONFIG_LM_

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5497 42af7a65-404d-4744-a932-0658087f49c3

Rename LM3S files, variables, and types from lm3s_ to lm_; Rename configuration variables from CONFIG_LM3S_ to CONFIG_LM_

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5497 42af7a65-404d-4744-a932-0658087f49c3

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5495 42af7a65-404d-4744-a932-0658087f49c3

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5495 42af7a65-404d-4744-a932-0658087f49c3