drm/nouveau/bios/fan: add support for maxwell's fan management table v2

Re-use the therm-exported fan structure with only two minor modifications:
- pwm_freq: u16 -> u32;
- add fan_type (toggle or PWM)

v2:
- Do not memset the table to 0 as it erases the pre-set default values

Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --cc drivers/gpu/drm/nouveau/Makefile
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/include/subdev/bios/fan.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/bios/fan.c
Simple merge