target/microblaze: Alias CPU endianness property as 'little-endian'

target/microblaze: Alias CPU endianness property as 'little-endian'

Alias the 'endian' property as 'little-endian' because the 'ENDI'
bit is set when the endianness is in little order, and unset in
big order.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20241105130431.22564-2-philmd@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Message-Id: <3f61b85c-9382-4520-a1ce-5476eb16fb56@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>