bsp/altera-cyclone-v: Increase size of nocache region and nocache heap

Increase size of nocache heap in order to be able to move mbufs and clusters of the network driver to uncached RAM
bsp/altera-cyclone-v: Move mbufs and network clusters to uncached RAM
libchip: Correct netstats message for dwmac driver
libchip: Add asserts to dwmac driver