Rename FVP specific files and functions

FVP specific files and functions containing the word "plat" have been
renamed to use the word "fvp" to distinguish them from the common
platform functionality and porting functions.

Change-Id: I39f9673dab3ee9c74bd18b3e62b7c21027232f7d
diff --git a/plat/fvp/include/plat_macros.S b/plat/fvp/include/plat_macros.S
index 1fa50fd..bdd402d 100644
--- a/plat/fvp/include/plat_macros.S
+++ b/plat/fvp/include/plat_macros.S
@@ -44,7 +44,7 @@
 	 */
 	.macro plat_print_gic_regs
 	mov	x0, #CONFIG_GICC_ADDR
-	bl	platform_get_cfgvar
+	bl	fvp_get_cfgvar
 	/* gic base address is now in x0 */
 	ldr	w1, [x0, #GICC_IAR]
 	ldr	w2, [x0, #GICD_CTLR]