xen/arm: bootfd: Fix indentation in process_multiboot_node()

One line in process_multiboot_node() is using hard tab rather than soft
tab. So fix it!

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

xen/arch/arm/bootfdt.c

@@ -264,7 +264,7 @@ static void __init process_multiboot_node(const void *fdt, int node,
         case 1: kind = BOOTMOD_RAMDISK; break;
         default: break;
         }
-	if ( kind_guess > 1 && has_xsm_magic(start) )
+        if ( kind_guess > 1 && has_xsm_magic(start) )
             kind = BOOTMOD_XSM;
     }