feat(tc): allow booting from DRAM

In some occasions it is useful to boot with the rest of system (RoS)
disabled. With no RoS there's no flash so we need to put images
somewhere and that's in the DRAM1 bank. If we want to access it it needs
to be mapped to memory.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I45e0fbb016e8f615d41b6ad9da0d1e7b466ece72

plat/arm/board/tc/tc_plat.c

@@ -30,6 +30,7 @@
 #if IMAGE_BL1
 const mmap_region_t plat_arm_mmap[] = {
 	ARM_MAP_SHARED_RAM,
+	TC_MAP_NS_DRAM1,
 	TC_FLASH0_RO,
 	TC_MAP_DEVICE,
 	{0}