riscv: Remove common.h usage

We can remove common.h from most cases of the code here, and only a few
places need an additional header instead.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Rick Chen <rick@andestech.com>

arch/riscv/lib/sifive_cache.c

@@ -3,9 +3,9 @@
  * Copyright (C) 2021 SiFive, Inc
  */
 
-#include <common.h>
 #include <cache.h>
 #include <cpu_func.h>
+#include <log.h>
 #include <dm.h>
 
 void enable_caches(void)