imx: Add basic support for the NXP IMXRT10xx SoC family

Add i.IMXRT family basic support.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
diff --git a/arch/arm/include/asm/arch-imxrt/clock.h b/arch/arm/include/asm/arch-imxrt/clock.h
new file mode 100644
index 0000000..7409028
--- /dev/null
+++ b/arch/arm/include/asm/arch-imxrt/clock.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef __ASM_ARCH_CLOCK_H
+#define __ASM_ARCH_CLOCK_H
+
+#endif /* __ASM_ARCH_CLOCK_H */