Fix violations to the coding style

All coding style violations have been fixed in a previous patch and
since then, each individual patch has been checked in this regard.
However, the latest version of the checkpatch.pl script from the Linux
kernel is more advanced and it is able to flag new errors in the
Trusted Firmware codebase. This patch fixes them.

Change-Id: I1f332f2440984be85d36b231bb83260368987077
diff --git a/plat/fvp/fvp_pm.c b/plat/fvp/fvp_pm.c
index 9044e69..c15d845 100644
--- a/plat/fvp/fvp_pm.c
+++ b/plat/fvp/fvp_pm.c
@@ -64,7 +64,7 @@
  * Function which implements the common FVP specific operations to power down a
  * cpu in response to a CPU_OFF or CPU_SUSPEND request.
  ******************************************************************************/
-static void fvp_cpu_pwrdwn_common()
+static void fvp_cpu_pwrdwn_common(void)
 {
 	/* Prevent interrupts from spuriously waking up this cpu */
 	arm_gic_cpuif_deactivate();
@@ -77,7 +77,7 @@
  * Function which implements the common FVP specific operations to power down a
  * cluster in response to a CPU_OFF or CPU_SUSPEND request.
  ******************************************************************************/
-static void fvp_cluster_pwrdwn_common()
+static void fvp_cluster_pwrdwn_common(void)
 {
 	uint64_t mpidr = read_mpidr_el1();
 
diff --git a/plat/juno/bl31_plat_setup.c b/plat/juno/bl31_plat_setup.c
index ad8ea43..1d33768 100644
--- a/plat/juno/bl31_plat_setup.c
+++ b/plat/juno/bl31_plat_setup.c
@@ -182,7 +182,7 @@
  * Perform the very early platform specific architectural setup here. At the
  * moment this is only intializes the mmu in a quick and dirty way.
  ******************************************************************************/
-void bl31_plat_arch_setup()
+void bl31_plat_arch_setup(void)
 {
 	configure_mmu_el3(BL31_RO_BASE,
 			  (BL31_END - BL31_RO_BASE),
diff --git a/plat/juno/plat_topology.c b/plat/juno/plat_topology.c
index c22edda..24be767 100644
--- a/plat/juno/plat_topology.c
+++ b/plat/juno/plat_topology.c
@@ -48,7 +48,7 @@
 	return aff_lvl <= MPIDR_AFFLVL1 ? PSCI_AFF_PRESENT : PSCI_AFF_ABSENT;
 }
 
-int plat_setup_topology()
+int plat_setup_topology(void)
 {
 	/* Juno todo: Make topology configurable via SCC */
 	return 0;