feat(rme): add dev granules tests

Add tests for RMI_GRANULE_DELEGATE and
RMI_GRANULE_UNDELEGATE commands using
device granules.
Add plat_get_dev_region() function to
retrieve platform PCIe memory region info.

Change-Id: Ie59361dd28e11db348c30b033c156de044aa0ffc
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
diff --git a/include/common/test_helpers.h b/include/common/test_helpers.h
index 1ab35ba..6482d6d 100644
--- a/include/common/test_helpers.h
+++ b/include/common/test_helpers.h
@@ -391,7 +391,7 @@
 	do {									\
 		u_register_t retrmm = 0U;					\
 										\
-		if (!get_armv9_2_feat_rme_support()) {				\
+		if (get_armv9_2_feat_rme_support() == 0U) {			\
 			tftf_testcase_printf("FEAT_RME not supported\n");	\
 			return TEST_RESULT_SKIPPED;				\
 		}								\