global: Add <linux/string.h> instead of long indirect include path

In a number of cases we have C files which rely on a chain of indirect
include paths to get <linux/string.h> to be included via <command.h>. To
facilitate cleaning up <command.h> make this code directly include
<linux/string.h>.

Signed-off-by: Tom Rini <trini@konsulko.com>

cmd/armflash.c

@@ -9,6 +9,7 @@
 #include <console.h>
 #include <flash.h>
 #include <vsprintf.h>
+#include <linux/string.h>
 #include <asm/io.h>
 
 #define MAX_REGIONS 4