gap-k is a calibration mechanism to eliminate power gaps between two nearly rate groups. This mechanism improves performance in long range test by applying proper power value to those rate groups which have nonlinear power gap. Signed-off-by: Guo-Feng Fan <vincent_fann@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20210419003748.3224-3-pkshih@realtek.com