[minip] Update udp chksum code to fit new struct layouts
[zynq] Move SLCR access to a struct layout, update clock interface
[gem]/[minip] mac and console changes

+ Add gem_set_macaddr
+ Disable promiscuous mode
+ Change flood command to raw
+ Change gem's console command from 'g' to 'gem'
+ Add status commands for both minip and gem
[bits] Add BIT_MASK macro
[minip] Don't add 0.0.0.0 to the arp table
[zynq] Convert the Zynq PLL init jam table into readable code

End goal will be to convert all the functions and remove ps7 entirely.