ramips: fix devicetree corruption with some boot loaders if the caches are not ready at boot

Signed-off-by: John Crispin <blogic@openwrt.org>

Backport of r46766

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46767 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ramips/patches-3.18/0065-fix_dts_cache_issues.patch

@@ -0,0 +1,18 @@
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -675,7 +675,6 @@
+ 				crashk_res.end - crashk_res.start + 1,
+ 				BOOTMEM_DEFAULT);
+ #endif
+-	device_tree_init();
+ 	sparse_init();
+ 	plat_swiotlb_setup();
+ 	paging_init();
+@@ -784,6 +783,7 @@
+ 	prefill_possible_map();
+ 
+ 	cpu_cache_init();
++	device_tree_init();
+ }
+ 
+ unsigned long kernelsp[NR_CPUS];