refactor(psa): change all occurrences of RSS to RSE

Changes all occurrences of "RSS" and "rss" in the code and build files
to "RSE" and "rse".

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I606e2663fb3719edf6372d6ffa4f1982eef45994
diff --git a/include/lib/psa/dice_protection_environment.h b/include/lib/psa/dice_protection_environment.h
index 61b6482..5351451 100644
--- a/include/lib/psa/dice_protection_environment.h
+++ b/include/lib/psa/dice_protection_environment.h
@@ -14,7 +14,7 @@
 
 #include <dice.h>
 
-/* Additional defines for max size limit. These limits are set by DPE in RSS. */
+/* Additional defines for max size limit. These limits are set by DPE in RSE. */
 #define DICE_AUTHORITY_DESCRIPTOR_MAX_SIZE	64
 #define DICE_CONFIG_DESCRIPTOR_MAX_SIZE		64
 #define DICE_CODE_DESCRIPTOR_MAX_SIZE		32
@@ -28,7 +28,7 @@
 #define DPE_ARGUMENT_NOT_SUPPORTED	((dpe_error_t)4)
 #define DPE_SESSION_EXHAUSTED		((dpe_error_t)5)
 
-/* Custom values in RSS based DPE implementation */
+/* Custom values in RSE based DPE implementation */
 #define DPE_INSUFFICIENT_MEMORY		((dpe_error_t)128)
 #define DPE_ERR_CBOR_FORMATTING		((dpe_error_t)129)