feat(rmm-eac4): update RSI_VERSION, add RSI_FEATURES

This patch updates API of RSI_VERSION and adds new
RSI_FEATURES command handler as per RMM Specification
1.0-eac4.
RSI_ABI_VERSION_MAJOR is updated from 13 to 14.

Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
Change-Id: I7d445d18ee7fddf9f20c51f2a45fd334cb17b454
diff --git a/runtime/tests/rsi_logger_tests.cpp b/runtime/tests/rsi_logger_tests.cpp
index ea549c1..3c62041 100644
--- a/runtime/tests/rsi_logger_tests.cpp
+++ b/runtime/tests/rsi_logger_tests.cpp
@@ -54,13 +54,10 @@
 	/* Fill output values */
 	switch (status) {
 	case LOG_SUCCESS:
-		regs[0] = (id == SMC_RSI_ABI_VERSION) ?
-				RSI_ABI_VERSION : RSI_SUCCESS;
+		regs[0] = RSI_SUCCESS;
 		break;
 	case LOG_ERROR:
-		regs[0] = (id == SMC_RSI_ABI_VERSION) ?
-				RSI_ABI_VERSION :
-				test_helpers_get_rand_in_range(RSI_ERROR_INPUT, RSI_INCOMPLETE);
+		regs[0] = test_helpers_get_rand_in_range(RSI_ERROR_INPUT, RSI_INCOMPLETE);
 		break;
 	default:
 		regs[0]	= rand();