Add Altera Nios-II boards EP1C20, EP1S10 and EP1S40

CHANGELOG

MAINTAINERS

MAKEALL

Makefile

README

board/altera/common/AMDLV065D.c

board/altera/common/epled.c

board/altera/ep1c20/Makefile

board/altera/ep1c20/config.mk

board/altera/ep1c20/ep1c20.c

board/altera/ep1c20/u-boot.lds

board/altera/ep1s10/Makefile

board/altera/ep1s10/config.mk

board/altera/ep1s10/ep1s10.c

board/altera/ep1s10/u-boot.lds

board/altera/ep1s40/Makefile

board/altera/ep1s40/config.mk

board/altera/ep1s40/ep1s40.c

board/altera/ep1s40/u-boot.lds

include/configs/EP1C20.h