fix(xlat): set MAX_PHYS_ADDR to total mapped physical region

Currently some platforms set PLAT_XLAT_TABLES_DYNAMIC=0 and
define it unconditionally also in platform Makefiles.
Due to this when PLAT_XLAT_TABLES_DYNAMIC=0 the limits for
MAX_PHYS_ADDR is wrongly set to the whole physical address space size.
Instead of definition the value of PLAT_XLAT_TABLES_DYNAMIC is checked
to set MAX_PHYS_ADDR to total mapped physical region.

Reference: plat/nvidia/tegra/platform.mk

Change-Id: I7bd786aaa4b039951341d0337f694074345f717f
Signed-off-by: Amit Nagal <amit.nagal@amd.com>

lib/xlat_tables_v2/xlat_tables_context.c

@@ -200,7 +200,7 @@ int xlat_make_tables_readonly(void)
  * region. Therefore, in this case we have to assume that the whole address
  * space size might be mapped.
  */
-#ifdef PLAT_XLAT_TABLES_DYNAMIC
+#if PLAT_XLAT_TABLES_DYNAMIC
 #define MAX_PHYS_ADDR	tf_xlat_ctx.pa_max_address
 #else
 #define MAX_PHYS_ADDR	tf_xlat_ctx.max_pa