SPM: RESET_TO_BL31 add a third cactus partition

A third cactus sample test partition was added to tf-a-tests.
The test fvp-spm-rst-bl31,fvp-default:fvp-spm.rstbl31 requires
the third partition to be preloaded when invoking the model as
BL1/BL2 do not exist in this test case.

Change-Id: I6bcb5b220718880cba8ec6077dd6b8877df8c22b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/model/fvp_common.sh b/model/fvp_common.sh
index f2baf40..d1a47a9 100644
--- a/model/fvp_common.sh
+++ b/model/fvp_common.sh
@@ -62,6 +62,7 @@
 ${spmc_manifest+--data ${data_instance}=$spmc_manifest@${spmc_manifest_addr:?}}
 ${sp1_pkg+--data ${data_instance}=$sp1_pkg@${sp1_addr:?}}
 ${sp2_pkg+--data ${data_instance}=$sp2_pkg@${sp2_addr:?}}
+${sp3_pkg+--data ${data_instance}=$sp3_pkg@${sp3_addr:?}}
 
 ${ns_bl1u_bin+--data ${data_instance}=$ns_bl1u_bin@$ns_bl1u_addr}
 ${fwu_fip_bin+--data ${data_instance}=$fwu_fip_bin@$fwu_fip_addr}