bootmeth_cros: Require bootm.o and bootm_os.o

In order to use bootmeth_cros, at least on non-X86, we need to be able
to start any type of kernel that the "bootm" code paths can handle.  Add
these objects to the required list for this option.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/boot/Makefile b/boot/Makefile
index ad60859..3fd048b 100644
--- a/boot/Makefile
+++ b/boot/Makefile
@@ -28,7 +28,7 @@
 obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EXTLINUX) += bootmeth_extlinux.o
 obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EXTLINUX_PXE) += bootmeth_pxe.o
 obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_EFILOADER) += bootmeth_efi.o
-obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_CROS) += bootmeth_cros.o
+obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_CROS) += bootm.o bootm_os.o bootmeth_cros.o
 obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_SANDBOX) += bootmeth_sandbox.o
 obj-$(CONFIG_$(SPL_TPL_)BOOTMETH_SCRIPT) += bootmeth_script.o
 ifdef CONFIG_$(SPL_TPL_)BOOTSTD_FULL