Fix some violations to MISRA rule 8.3

Wherever we use 'struct foo' and 'foo_t' interchangeably in a
function's declaration and definition, use 'struct foo' consistently
for both, as per the TF-A coding guidelines [1].

[1] https://github.com/ARM-software/arm-trusted-firmware/wiki/ARM-Trusted-Firmware-Coding-Guidelines#avoid-anonymous-typedefs-of-structsenums-in-header-files

Change-Id: I7998eb24a26746e87e9b6425529926406745b721
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/services/spd/opteed/opteed_main.c b/services/spd/opteed/opteed_main.c
index 01ec2a2..59d6ed2 100644
--- a/services/spd/opteed/opteed_main.c
+++ b/services/spd/opteed/opteed_main.c
@@ -34,7 +34,7 @@
  * Address of the entrypoint vector table in OPTEE. It is
  * initialised once on the primary core after a cold boot.
  ******************************************************************************/
-optee_vectors_t *optee_vector_table;
+struct optee_vectors *optee_vector_table;
 
 /*******************************************************************************
  * Array to keep track of per-cpu OPTEE state