drm/amdgpu: optimize the gpu reset for XGMI setup V2

This is basically just some code cosmetic. The current design
for XGMI setup gput reset is to operate on current device(adev)
first and then on other devices from the hive(by another 'for' loop).
But actually we can do some sort to the device list(to put current
device 1st position) and handle all the devices in a single 'for'
loop.

V2: added missing hive->hive_lock protection

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>