fix(a3k): fix comment about BootROM address range

A53 AP BootROM is just 16 kB long and is mapped to address range
0xFFFF0000-0xFFFF4000. RVBAR_EL3 register has value 0xFFFF0000.
A53 AP BootROM itself is in the BootROM window which is 1 MB long and
mapped to address range 0xFFF00000-0xFFFFFFFF.

CM3 BootROM is not accessible from A53 core.

Signed-off-by: Pali Rohár <pali@kernel.org>
Change-Id: I5d4a4c7b1e7550c4738c67a872d341f945d48bbc
diff --git a/plat/marvell/armada/a3k/common/dram_win.c b/plat/marvell/armada/a3k/common/dram_win.c
index e89f295..9d7b3a9 100644
--- a/plat/marvell/armada/a3k/common/dram_win.c
+++ b/plat/marvell/armada/a3k/common/dram_win.c
@@ -106,7 +106,9 @@
 	 *    to configure it again here;
 	 *
 	 *	0xFFFFFFFF ---> +-----------------------+
-	 *			|	 Boot ROM	| 64 KB
+	 *			|	 Boot ROM	| 1 MB
+	 *			| AP Boot ROM - 16 KB:  |
+	 *			| 0xFFFF0000-0xFFFF4000 |
 	 *	0xFFF00000 ---> +-----------------------+
 	 *			:			:
 	 *	0xFE010000 ---> +-----------------------+