thanks to ultimo and others I think I have the pi2 switching back to svc and secure mode now.

and other cleanup

boards/pi2/bootloader07/Makefile

@@ -0,0 +1,34 @@
+
+ARMGNU ?= arm-none-eabi
+
+COPS = -Wall -O2 -nostdlib -nostartfiles -ffreestanding 
+
+all : kernel7.img 
+
+clean :
+	rm -f *.o
+	rm -f *.bin
+	rm -f *.hex
+	rm -f *.elf
+	rm -f *.list
+	rm -f *.img
+	rm -f *.bc
+	rm -f *.clang.s
+
+
+vectors.o : vectors.s
+	$(ARMGNU)-as vectors.s -o vectors.o
+
+bootloader07.o : bootloader07.c
+	$(ARMGNU)-gcc $(COPS) -c bootloader07.c -o bootloader07.o
+
+periph.o : periph.c 
+	$(ARMGNU)-gcc $(COPS) -c periph.c -o periph.o
+
+kernel7.img : loader vectors.o periph.o bootloader07.o 
+	$(ARMGNU)-ld vectors.o periph.o bootloader07.o -T loader -o bootloader07.elf
+	$(ARMGNU)-objdump -D bootloader07.elf > bootloader07.list
+	$(ARMGNU)-objcopy bootloader07.elf -O ihex bootloader07.hex
+	$(ARMGNU)-objcopy bootloader07.elf -O binary kernel7.img
+
+