refactor: change all occurrences of RSS to RSE

The Runtime Security Subsytem (RSS) was renamed to Runtime Security
Engine (RSE). Change all occurrences of "RSS"/"rss" in the code and file
names to "RSE"/"rse".
The related changes in TF-A can be found under the "rss_rse_rename"
topic: https://review.trustedfirmware.org/q/topic:%22rss_rse_rename%22

Change-Id: Icd72ff3ed2d63e87d84baadfab02ccf75a545d08
Signed-off-by: David Vincze <david.vincze@arm.com>
diff --git a/run_config/fvp-tc.spm.tftf b/run_config/fvp-tc.spm.tftf
index 09bdb30..552a52e 100644
--- a/run_config/fvp-tc.spm.tftf
+++ b/run_config/fvp-tc.spm.tftf
@@ -5,7 +5,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-source "$ci_root/run_config/tc_rss_utils.sh"
+source "$ci_root/run_config/tc_rse_utils.sh"
 
 post_tf_build() {
     if [ ! -f "$archive/scp_ram.bin" ]; then
@@ -17,10 +17,10 @@
 }
 
 fetch_tf_resource() {
-    # RSS output is printed to UART 2 so track it.
+    # RSE output is printed to UART 2 so track it.
     uart="1" port="5003" file="hold_uart.exp" track_expect
 
-    get_rss_prov_bins
+    get_rse_prov_bins
 
     sign_image bl1.bin $ap_bl1_flash_load_addr $ap_bl1_flash_size