drm/i915: conversion to new logging macros in i915/intel_device_info.c

This replaces the printk and struct device based logging macros with the
new struct drm_device style based logging macros i915/intel_device_info.c.

Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e404429ff2a5e5080867f577beccd7b578a671cd.1578560355.git.wambui.karugax@gmail.com