mac80211: add debugfs file for last rx rate
mac80211: add debugfs file for last rx rate

Add a debugfs file showing the rate at which
the last packet is received.

Signed-off-by: Saravana <95169c66b31df291c0847c38449b1cdc2bcc2e7c@posedge.com>
[fix whitespace]
Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs