common/board_r: Move blkcache_init call earlier in the boot sequence

blkcache_init manually relocates blkcache list pointers when
CONFIG_NEEDS_MANUAL_RELOC is enabled. However, it is called very late in
the boot sequence, which could be a problem if previous boot calls execute
blkcache operations with the non-relocated pointers. For example, mmc is
initialized earlier and might call blkcache_invalidate (in
mmc_select_hwpart()) when trying to load the environment from mmc via
env_load().

To fix this issue, move blkcache_init boot call earlier, before mmc gets
initialized.

Acked-by: Angelo Dureghello <angelo.dureghello@timesys.com>
Tested-by: Angelo Dureghello <angelo.dureghello@timesys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
diff --git a/common/board_r.c b/common/board_r.c
index 53792e9..d48d2bb 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -714,6 +714,9 @@
 	initr_watchdog,
 #endif
 	INIT_FUNC_WATCHDOG_RESET
+#if defined(CONFIG_NEEDS_MANUAL_RELOC) && defined(CONFIG_BLOCK_CACHE)
+	blkcache_init,
+#endif
 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 	initr_manual_reloc_cmdtable,
 #endif
@@ -848,9 +851,6 @@
 #if defined(CONFIG_PRAM)
 	initr_mem,
 #endif
-#if defined(CONFIG_NEEDS_MANUAL_RELOC) && defined(CONFIG_BLOCK_CACHE)
-	blkcache_init,
-#endif
 	run_main_loop,
 };