rpi3: Fix warm entrypoint setup for PSCI_CPU_ON

Remove unused variable and set the secure entrypoint correctly.

Change-Id: I7447ea62771092de6be35704077ae28c519d6993
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/include/platform_def.h b/plat/rpi3/include/platform_def.h
index 5b84aa6..52b06b4 100644
--- a/plat/rpi3/include/platform_def.h
+++ b/plat/rpi3/include/platform_def.h
@@ -117,9 +117,11 @@
  */
 #define PLAT_RPI3_TRUSTED_MAILBOX_BASE	SHARED_RAM_BASE
 
+/* The secure entry point to be used on warm reset by all CPUs. */
 #define PLAT_RPI3_TM_ENTRYPOINT		PLAT_RPI3_TRUSTED_MAILBOX_BASE
 #define PLAT_RPI3_TM_ENTRYPOINT_SIZE	ULL(8)
 
+/* Hold entries for each CPU. */
 #define PLAT_RPI3_TM_HOLD_BASE		(PLAT_RPI3_TM_ENTRYPOINT + \
 					 PLAT_RPI3_TM_ENTRYPOINT_SIZE)
 #define PLAT_RPI3_TM_HOLD_ENTRY_SIZE	ULL(8)