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/plat/arm/common/arm_bl1_setup.c b/plat/arm/common/arm_bl1_setup.c
index d141f64..1c900b7 100644
--- a/plat/arm/common/arm_bl1_setup.c
+++ b/plat/arm/common/arm_bl1_setup.c
@@ -27,7 +27,7 @@
 /* Data structure which holds the extents of the trusted SRAM for BL1*/
 static meminfo_t bl1_tzram_layout;
 
-meminfo_t *bl1_plat_sec_mem_layout(void)
+struct meminfo *bl1_plat_sec_mem_layout(void)
 {
 	return &bl1_tzram_layout;
 }