Add support for asynchronous FIQ handling in TSP

This patch adds support in the TSP to handle FIQ interrupts that are
generated when execution is in the TSP. S-EL1 interrupt are handled
normally and execution resumes at the instruction where the exception
was originally taken. S-EL3 interrupts i.e. any interrupt not
recognized by the TSP are handed to the TSPD. Execution resumes
normally once such an interrupt has been handled at EL3.

Change-Id: Ia3ada9a4fb15670afcc12538a6456f21efe58a8f
diff --git a/bl32/tsp/tsp.mk b/bl32/tsp/tsp.mk
index 297556b..b9084d5 100644
--- a/bl32/tsp/tsp.mk
+++ b/bl32/tsp/tsp.mk
@@ -30,6 +30,7 @@
 
 BL32_SOURCES		+=	bl32/tsp/tsp_main.c			\
 				bl32/tsp/aarch64/tsp_entrypoint.S	\
+				bl32/tsp/aarch64/tsp_exceptions.S	\
 				bl32/tsp/aarch64/tsp_request.S		\
 				bl32/tsp/tsp_interrupt.c		\
 				bl32/tsp/tsp_timer.c			\