arm/config: Declare ELFSIZE_64.

Otherwise any code that tries to use Elf_* macros would
require us to use Elf64_* types instead of the more
friendly Elf_ one.

This is OK to do since 32-bit ARM uses LPAE mode.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

xen/include/asm-arm/config.h

@@ -25,6 +25,9 @@
 /* xen_ulong_t is always 64 bits */
 #define BITS_PER_XEN_ULONG 64
 
+/* And ELF files are also 64-bit. */
+#define ELFSIZE 64
+
 #define CONFIG_PAGING_ASSISTANCE 1
 
 #define CONFIG_PAGING_LEVELS 3