FVP: apply new naming conventions to memory regions

Secure ROM at address 0x0000_0000 is defined as FVP_TRUSTED_ROM
Secure RAM at address 0x0400_0000 is defined as FVP_TRUSTED_SRAM
Secure RAM at address 0x0600_0000 is defined as FVP_TRUSTED_DRAM

BLn_BASE and BLn_LIMIT definitions have been updated and are based on
these new memory regions.

The available memory for each bootloader in the linker script is
defined by BLn_BASE and BLn_LIMIT, instead of the complete memory
region.

TZROM_BASE/SIZE and TZRAM_BASE/SIZE are no longer required as part of
the platform porting.

FVP common definitions are defined in fvp_def.h while platform_def.h
contains exclusively (with a few exceptions) the definitions that are
mandatory in the porting guide. Therefore, platform_def.h now includes
fvp_def.h instead of the other way around.

Porting guide has been updated to reflect these changes.

Change-Id: I39a6088eb611fc4a347db0db4b8f1f0417dbab05
diff --git a/plat/fvp/fvp_pm.c b/plat/fvp/fvp_pm.c
index 22e53e1..775e558 100644
--- a/plat/fvp/fvp_pm.c
+++ b/plat/fvp/fvp_pm.c
@@ -103,7 +103,7 @@
 	} while (psysr & PSYSR_AFF_L0);
 
 	linear_id = platform_get_core_pos(mpidr);
-	fvp_mboxes = (mailbox_t *) (TZDRAM_BASE + MBOX_OFF);
+	fvp_mboxes = (mailbox_t *) (FVP_TRUSTED_DRAM_BASE + MBOX_OFF);
 	fvp_mboxes[linear_id].value = sec_entrypoint;
 	flush_dcache_range((unsigned long) &fvp_mboxes[linear_id],
 			   sizeof(unsigned long));
@@ -240,7 +240,8 @@
 
 			/* Program the jump address for the target cpu */
 			linear_id = platform_get_core_pos(mpidr);
-			fvp_mboxes = (mailbox_t *) (TZDRAM_BASE + MBOX_OFF);
+			fvp_mboxes = (mailbox_t *) (FVP_TRUSTED_DRAM_BASE +
+					MBOX_OFF);
 			fvp_mboxes[linear_id].value = sec_entrypoint;
 			flush_dcache_range((unsigned long) &fvp_mboxes[linear_id],
 					   sizeof(unsigned long));
@@ -329,7 +330,8 @@
 		fvp_pwrc_clr_wen(mpidr);
 
 		/* Zero the jump address in the mailbox for this cpu */
-		fvp_mboxes = (mailbox_t *) (TZDRAM_BASE + MBOX_OFF);
+		fvp_mboxes = (mailbox_t *) (FVP_TRUSTED_DRAM_BASE +
+				MBOX_OFF);
 		linear_id = platform_get_core_pos(mpidr);
 		fvp_mboxes[linear_id].value = 0;
 		flush_dcache_range((unsigned long) &fvp_mboxes[linear_id],