The hardware information surfaced via debugfs might be usable by the
userspace to set some configuration knobs. This patch sets the hw_info
for Intel and Realtek chipsets.

Below are some possible output of the hardware_info debugfs file.
INTEL platform=55 variant=24
RTL lmp_subver=34898 hci_rev=10 hci_ver=11 hci_bus=1
Signed-off-by: Archie Pusaka <apusaka@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>