sgi/acs: allow this script to be usable on rde1edge platform

RD-E1-Edge platform can be validated using ACS test suite. So enable
usability of this script on RD-E1-Edge platform.

Change-Id: I96b767f8a1ff89ddb7df1a3d3685b2c985d057ab
Signed-off-by: Aluvala Sai Akhilesh <aluvala.saiakhilesh@arm.com>

sgi/acs.sh

@@ -37,6 +37,7 @@ declare -A platforms_sgi
 platforms_sgi[sgi575]=1
 declare -A platforms_rdinfra
 platforms_rdinfra[rdn1edge]=1
+platforms_rdinfra[rde1edge]=1
 
 __print_examples()
 {