feat(scp): scp/mcp v2.9.0 update - rdv1

Updates rdv1 test suite to use v2.9.0 scp/mcp prebuilds

Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Change-Id: Id6daccb01824cdb84f6d7202b7ef5596fd6447db
diff --git a/rdv1_utils.sh b/rdv1_utils.sh
index 549e7e3..4b2c446 100644
--- a/rdv1_utils.sh
+++ b/rdv1_utils.sh
@@ -9,8 +9,8 @@
 
 sgi_prebuilts="${sgi_prebuilts:-$css_downloads/sgi/rdv1}"
 
-# Pre-built SCP/MCP v2.8.0 release binaries
-scp_mcp_prebuilts="${scp_mcp_prebuilts:-$css_downloads_280/sgi/rdv1}"
+# Pre-built SCP/MCP binaries
+scp_mcp_prebuilts="${scp_mcp_prebuilts:-$scp_mcp_downloads/rdv1/release}"
 
 
 fvp_kernels[fvp-sgi-busybox]="$sgi_prebuilts/Image"