ath9k: rename ath_rc_ratefind_ht() to ath_rc_get_highest_rix()
ath9k: rename ath_rc_ratefind_ht() to ath_rc_get_highest_rix()

The purpose is to find the highest rate we can use.

Cc: Derek Smithies <e1c79a582b6629e6b39e9679f4bb964d25db4aa8@indranet.co.nz>
Cc: Chittajit Mitra <f78639665717f5e29c2c34c9760054637a4f8ffa@Atheros.com>
Signed-off-by: Luis R. Rodriguez <79e6b8107a8aa3944e09fad43634662ac3b91a0b@atheros.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

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