Build: Enable IRQ test for SFN backend

Change-Id: Icd6e1ae07b646a7c877dc8949d272f5cddbcafe9
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
diff --git a/test/config/check_config.cmake b/test/config/check_config.cmake
index 0b1c725..b52e3a0 100644
--- a/test/config/check_config.cmake
+++ b/test/config/check_config.cmake
@@ -52,7 +52,7 @@
 tfm_invalid_config(NOT TFM_PARTITION_AUDIT_LOG AND (TEST_NS_AUDIT OR TEST_S_AUDIT))
 
 tfm_invalid_config((TEST_NS_IPC OR TEST_S_IPC OR TEST_NS_SLIH_IRQ OR TEST_NS_FLIH_IRQ) AND (TFM_LIB_MODEL))
-tfm_invalid_config((TEST_NS_IPC OR TEST_S_IPC OR TEST_NS_CORE OR TEST_NS_SLIH_IRQ OR TEST_NS_FLIH_IRQ) AND CONFIG_TFM_SPM_BACKEND_SFN)
+tfm_invalid_config((TEST_NS_IPC OR TEST_S_IPC OR TEST_NS_CORE) AND CONFIG_TFM_SPM_BACKEND_SFN)
 tfm_invalid_config(TEST_S_SFN_BACKEND AND CONFIG_TFM_SPM_BACKEND_IPC)
 
 tfm_invalid_config(CONFIG_TFM_FP STREQUAL "soft" AND (TEST_S_FPU OR TEST_NS_FPU))