sunxi: Fix typos of spelling Allwinner

Signed-off-by: Priit Laes <plaes@plaes.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>

arch/arm/mach-sunxi/dram_sun4i.c

@@ -5,7 +5,7 @@
  * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
  *
  * Based on sun4i Linux kernel sources mach-sunxi/pm/standby/dram*.c
- * and earlier U-Boot Allwiner A10 SPL work
+ * and earlier U-Boot Allwinner A10 SPL work
  *
  * (C) Copyright 2007-2012
  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>

arch/arm/mach-sunxi/p2wi.c

@@ -5,7 +5,7 @@
  * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
  * http://linux-sunxi.org
  *
- * Based on sun6i sources and earlier U-Boot Allwiner A10 SPL work
+ * Based on sun6i sources and earlier U-Boot Allwinner A10 SPL work
  *
  * (C) Copyright 2006-2013
  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>

board/sunxi/README.sunxi64

@@ -130,7 +130,7 @@ U-Boot prompt on the serial console.
 
 (Legacy) boot0 method
 ---------------------
-boot0 is Allwiner's secondary program loader and it can be used as some kind
+boot0 is Allwinner's secondary program loader and it can be used as some kind
 of SPL replacement to get U-Boot up and running from an microSD card.
 For some time using boot0 was the only option to get the Pine64 booted.
 With working DRAM init code in U-Boot's SPL this is no longer necessary,