sgi/boot: add rddaniel as a supported platform

Enable busybox boot test for RD-Daniel platform.

Change-Id: I5521ce8d8d76760b31891cf130d65ac9d8bf0029
Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>

sgi/boot.sh

@@ -39,6 +39,7 @@ platforms_sgi[sgi575]=1
 declare -A platforms_rdinfra
 platforms_rdinfra[rdn1edge]=1
 platforms_rdinfra[rde1edge]=1
+platforms_rdinfra[rddaniel]=1
 
 __print_examples()
 {