test(realm): unify SIMD test cases

There are two testcases host_realm_fpu_access_in_rl_ns_se and
host_and_realm_check_simd which verifies SIMD state across different
world switch. This change unifies both these testcases to one test case
host_realm_swd_check_simd so that new enhancements or fixes can be done
in one place.

This change also increases the code coverage by removing the restriction
on the need for both secure partition and realm payload as a
prerequisite.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I210acdff9e584cb392a2f1919dce04971fd2fc7a
diff --git a/tftf/tests/tests-realm-payload.mk b/tftf/tests/tests-realm-payload.mk
index 4d92552..ae4b20a 100644
--- a/tftf/tests/tests-realm-payload.mk
+++ b/tftf/tests/tests-realm-payload.mk
@@ -12,6 +12,7 @@
 	$(addprefix tftf/tests/runtime_services/realm_payload/,		\
 		host_realm_payload_multiple_rec_tests.c			\
 		host_realm_payload_tests.c				\
+		host_realm_simd_common.c				\
 		host_realm_spm.c					\
 		host_realm_payload_simd_tests.c				\
 		host_realm_lpa2_tests.c					\