[PATCH] random: fix a compilation error on arm64

[Qian Cai <cai@lca.pw>]

linux-next failed to compile using this .config,
https://gitlab.com/cailca/linux-mm/-/blob/master/arm64.config

arch/arm64/kernel/kaslr.c: In function 'kaslr_early_init':
arch/arm64/kernel/kaslr.c:128:6: error: implicit declaration of function
'__early_cpu_has_rndr'; did you mean '__early_pfn_to_nid'?
[-Werror=implicit-function-declaration]
  if (__early_cpu_has_rndr()) {
      ^~~~~~~~~~~~~~~~~~~~
      __early_pfn_to_nid
arch/arm64/kernel/kaslr.c:131:7: error: implicit declaration of function
'__arm64_rndr' [-Werror=implicit-function-declaration]
   if (__arm64_rndr(&raw))
       ^~~~~~~~~~~~
cc1: some warnings being treated as errors

Fixes: 585524081ecd ("random: random.h should include archrandom.h, not the other way around")
Signed-off-by: Qian Cai <cai@lca.pw>
---
 include/linux/random.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/random.h b/include/linux/random.h
index f45b8be3e3c4..da782c16c20c 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -12,6 +12,8 @@
 #include <linux/list.h>
 #include <linux/once.h>
 
+#include <asm/archrandom.h>
+
 #include <uapi/linux/random.h>
 
 struct random_ready_callback {
-- 
2.18.4