Switch to using the private watchdog as the run time stats timer in the Zynq demo.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2255 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
Remove some of the lwip asserts to allow use with 64-bit alignment.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2256 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
Zynq demo:  Fix Xilinx network driver by deferring the function that allocated memory from the interrupt into a task.  Add DHCP option.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2257 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
Added portASSERT_IF_IN_INTERRUPT() macro to the GCC Cortex A9 port layer.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2258 1d2547de-c912-0410-9cb9-b8ca96c0e9e2