feat(scp): scp/mcp v2.9.0 update - rdn1e1

Updates rdn1edge and rdn1edgex2 test suite to use v2.9.0 scp/mcp
prebuilds

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: I18bfee67250b61cc1fd1f755b21caba920f79d52
diff --git a/rdn1edgex2_utils.sh b/rdn1edgex2_utils.sh
index 1c3663f..8c844c4 100644
--- a/rdn1edgex2_utils.sh
+++ b/rdn1edgex2_utils.sh
@@ -9,8 +9,8 @@
 
 sgi_prebuilts="${sgi_prebuilts:-$css_downloads/sgi/rdn1edgex2}"
 
-# Pre-built SCP/MCP v2.8.0 release binaries
-scp_mcp_prebuilts="${scp_mcp_prebuilts:-$css_downloads_280/sgi/rdn1edgex2}"
+# Pre-built SCP/MCP binaries
+scp_mcp_prebuilts="${scp_mcp_prebuilts:-$scp_mcp_downloads/rdn1e1/release}"
 
 fvp_kernels[fvp-sgi-busybox]="$sgi_prebuilts/Image"
 fvp_initrd_urls[fvp-sgi-ramdisk]="$sgi_prebuilts/ramdisk-busybox.img"