media: m5mols/m5mols.h: document new reset field

The new reset field in struct m5mols_info was not documented,
add this.

This fixes a kerneldoc warning:

drivers/media/i2c/m5mols/m5mols.h:244: warning: Function parameter or member 'reset' not described in 'm5mols_info'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: aaaf357f (media: m5mols: Convert to use GPIO descriptors)
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>