ARM: Add ARMv7-M support

Signed-off-by: Kamil Lulko <rev13@wp.pl>
diff --git a/arch/arm/cpu/armv7m/Makefile b/arch/arm/cpu/armv7m/Makefile
new file mode 100644
index 0000000..aff60e8
--- /dev/null
+++ b/arch/arm/cpu/armv7m/Makefile
@@ -0,0 +1,9 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+extra-y := start.o
+obj-y += cpu.o