ethtool: hibmcge: fix wrong register address in pretty print of ethtool -d command

The addresses of mac_addr_h and mac_addr_l are wrong,
they need to be swapped.

Fixes: d89f6ee9c12a ("hibmcge: add support dump registers for hibmcge driver")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>