MIPS: kernel: entry.S: Add MIPS R6 related definitions
MIPS: kernel: entry.S: Add MIPS R6 related definitions

The instruction hazard barrier in the form of:

jr.hb	ra
nop

is valid on MIPS R6 as well.

Signed-off-by: Markos Chandras <5cdbcb0e11d2b5ebc39222958c54a1c6329d0c9d@imgtec.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs