feat(imx8mq): make IMX_BOOT_UART_BASE configurable via build parameter

This aligns the i.MX8MQ build with the other i.MX8M platforms by
allowing to override the default IMX_BOOT_UART_BASE value via a make
parameter.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Change-Id: Iad9b844517209fc7d051c61767f71ac9fa2b55c7
diff --git a/plat/imx/imx8m/imx8mq/include/platform_def.h b/plat/imx/imx8m/imx8mq/include/platform_def.h
index 1dd22d9..4671cd3 100644
--- a/plat/imx/imx8m/imx8mq/include/platform_def.h
+++ b/plat/imx/imx8m/imx8mq/include/platform_def.h
@@ -54,7 +54,6 @@
 
 #define HAB_RVT_BASE			U(0x00000880) /* HAB_RVT for i.MX8MQ */
 
-#define IMX_BOOT_UART_BASE		U(0x30860000)
 #define IMX_BOOT_UART_CLK_IN_HZ		25000000 /* Select 25Mhz oscillator */
 #define PLAT_CRASH_UART_BASE		IMX_BOOT_UART_BASE
 #define PLAT_CRASH_UART_CLK_IN_HZ	25000000
diff --git a/plat/imx/imx8m/imx8mq/platform.mk b/plat/imx/imx8m/imx8mq/platform.mk
index 7b6df92..f62d3aa 100644
--- a/plat/imx/imx8m/imx8mq/platform.mk
+++ b/plat/imx/imx8m/imx8mq/platform.mk
@@ -52,6 +52,9 @@
 BL32_SIZE		?=	0x2000000
 $(eval $(call add_define,BL32_SIZE))
 
+IMX_BOOT_UART_BASE	?=	0x30860000
+$(eval $(call add_define,IMX_BOOT_UART_BASE))
+
 ifeq (${SPD},trusty)
 	BL31_CFLAGS    +=      -DPLAT_XLAT_TABLES_DYNAMIC=1
 endif