Bugfix - adjust u-boot compiler issues

This fixes Rockpi S u-boot compilation on GCC10 / Hirsute host

patch/u-boot/u-boot-rockchip64/0001-fixing-dtc-error.patch

@@ -0,0 +1,26 @@
+From 97bca7b4cec321501a710cb0ce8b598a9e746a19 Mon Sep 17 00:00:00 2001
+From: Igor Pecovnik <igor.pecovnik@gmail.com>
+Date: Mon, 8 Mar 2021 13:12:41 +0000
+Subject: [PATCH] ;spi;u-boot-spl.kwb:u-boot.flash
+
+Signed-off-by: Igor Pecovnik <igor.pecovnik@gmail.com>
+---
+ scripts/dtc/dtc-lexer.l | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
+index fd825eb..f57c9a7 100644
+--- a/scripts/dtc/dtc-lexer.l
++++ b/scripts/dtc/dtc-lexer.l
+@@ -38,7 +38,7 @@ LINECOMMENT	"//".*\n
+ #include "srcpos.h"
+ #include "dtc-parser.tab.h"
+ 
+-YYLTYPE yylloc;
++extern YYLTYPE yylloc;
+ extern bool treesource_error;
+ 
+ /* CAUTION: this will stop working if we ever use yyless() or yyunput() */
+-- 
+Created with Armbian build tools https://github.com/armbian/build
+