build(intel): define a macro for SIMICS build

SIMICS builds have different UART configurations compared
to hardware build. Hence, this patch defines a macro to
differentiate between both.

Signed-off-by: Abdul Halim, Muhammad Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: Iadecd5445e06611486ac3c6a214a6d0dc8ccd27b
diff --git a/plat/intel/soc/n5x/platform.mk b/plat/intel/soc/n5x/platform.mk
index f139848..722694d 100644
--- a/plat/intel/soc/n5x/platform.mk
+++ b/plat/intel/soc/n5x/platform.mk
@@ -46,4 +46,5 @@
 BL2_AT_EL3			:= 1
 BL2_INV_DCACHE			:= 0
 MULTI_CONSOLE_API		:= 1
+SIMICS_BUILD			:= 0
 USE_COHERENT_MEM		:= 1