nios2: Add Nios2 R1 EB
nios2: Add Nios2 R1 EB

Add support for Big-Endian Nios2 R1 .

Signed-off-by: Marek Vasut <f40600653b33f5282fa4c5daf377dfc444fb4625@denx.de>
Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-altera,kraj/meta-altera,dwesterg/meta-altera,dwesterg/meta-altera,kraj/meta-altera