Fix mkcimage task dependency in kernel-cuimage

The cuimage is used in the install task so it must be
generated by then.
diff --git a/classes/kernel-cuimage.bbclass b/classes/kernel-cuimage.bbclass
index 25d8f24..ef77d34 100644
--- a/classes/kernel-cuimage.bbclass
+++ b/classes/kernel-cuimage.bbclass
@@ -42,4 +42,4 @@
 	fi
 }
 
-addtask uboot_mkcimage before do_bundle_initramfs after do_compile
+addtask uboot_mkcimage before do_install after do_compile