IB/mlx4: Fix incorrect comment
IB/mlx4: Fix incorrect comment

mlx4 hardware does not support external DDR memory.  Moreover, UAR
area (BAR 2) can change depending on FW version.

Signed-off-by: Eli Cohen <3ca62a2ad87376be2697209a1770e1afdbbba220@mellanox.co.il>
Signed-off-by: Roland Dreier <91e9b5f7ca0bb6300133ed378670d64af90dde66@cisco.com>

KristFoundation/Programs,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,TeamVee-Kanas/android_kernel_samsung_kanas