plat/arm: Get the base address of nv-counters from device tree

Using the Fconf, register base address of the various nv-counters
(currently, trusted, non-trusted nv-counters) are moved to the
device tree and retrieved during run-time. This feature is
enabled using the build option COT_DESC_IN_DTB.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I236f532e63cea63b179f60892cb406fc05cd5830
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index a7d1825..b6a9dae 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -168,6 +168,9 @@
 				${FVP_SECURITY_SOURCES}
 
 
+ifeq (${COT_DESC_IN_DTB},1)
+BL2_SOURCES		+=	plat/arm/common/fconf/fconf_nv_cntr_getter.c
+endif
 
 ifeq (${BL2_AT_EL3},1)
 BL2_SOURCES		+=	plat/arm/board/fvp/${ARCH}/fvp_helpers.S	\