iwlwifi: update iwl-commands.h for 3 stream support
iwlwifi: update iwl-commands.h for 3 stream support

This patch updates comments and constants to support 1, 2, or 3 spatial streams
in rate_n_flags .

Signed-off-by: Daniel Halperin <69d69634438b8e566415ab7764eb5afe1c3356c1@intel.com>
Signed-off-by: Tomas Winkler <002a8af089113a6510dbc00453be711ac350fd80@intel.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

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