linuxboot: add rdn2cfg1 as supported platform

Enable linuxboot test for RD-N2-CFG1 platform.

This is an initial implementation of linuxboot for RD-N2-CFG1 Platform
and not the final version.
Signed-off-by: Shriram K <shriram.k@arm.com>
Change-Id: I91c2e0360a1aab7bb0c916ce0afd5e31b72da038

sgi/linuxboot.sh

@@ -37,6 +37,7 @@ source $PWD/../sgi/sgi_common_util.sh
 declare -A platforms_rdinfra
 platforms_rdinfra[rdv1]=1
 platforms_rdinfra[rdn2]=1
+platforms_rdinfra[rdn2cfg1]=1
 
 __print_examples()
 {