[mellanox]: Update SAI revision. (#593)

New revision contains fixes to LAG and WRED configuration.

Signed-off-by: marian-pritsak <[email protected]>

Author: marian-pritsak

platform/mellanox/mlnx-sai.mk

@@ -1,7 +1,7 @@
 # Mellanox SAI
 
 MLNX_SAI_VERSION = 161120
-MLNX_SAI_REVISION = 1a4307f0ac40b28cd8ed8f48569458212d90366e
+MLNX_SAI_REVISION = dd6b7cf8fcdc87a40cb694799daf8c081e859a14
 
 export MLNX_SAI_VERSION MLNX_SAI_REVISION