imx: introduce is_imx8mq helper

Introduce is_imx8mq header macro

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/include/asm/mach-imx/sys_proto.h b/arch/arm/include/asm/mach-imx/sys_proto.h
index f8890b5..e3dd5f5 100644
--- a/arch/arm/include/asm/mach-imx/sys_proto.h
+++ b/arch/arm/include/asm/mach-imx/sys_proto.h
@@ -42,6 +42,7 @@
 
 #define is_mx7ulp() (is_cpu_type(MXC_CPU_MX7ULP))
 
+#define is_imx8mq() (is_cpu_type(MXC_CPU_IMX8MQ))
 #define is_imx8qxp() (is_cpu_type(MXC_CPU_IMX8QXP))
 
 #ifdef CONFIG_MX6