xen: move CONFIG_DEBUG_INFO out of EXPERT section

In order to support hypervisor analysis of crash dumps, xen-syms needs
to contain debug_info. It should be allowed to configure the hypervisor
to be built with CONFIG_DEBUG_INFO in non-debug builds without having
to enable EXPERT.

Using a rather oldish gcc (7.5) it was verified that code generation
doesn't really differ between CONFIG_DEBUG_INFO on or off without
CONFIG_DEBUG being set (only observed differences were slightly
different symbol addresses, verified via "objdump -d", resulting from
the different config.gz in the binary). The old gcc version selection
was based on the assumption, that newer gcc won't regress in this
regard.

So move CONFIG_DEBUG_INFO out of the section guarded by EXPERT.

It should be mentioned that there have been reports that the linking
of the xen.efi might take considerably longer with CONFIG_DEBUG_INFO
selected when using newer binutils.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Dietmar Hahn <dietmar.hahn@fujitsu.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/Kconfig.debug

@@ -28,13 +28,6 @@ config GDBSX
 	  If you want to enable support for debugging guests from dom0 via
 	  gdbsx then say Y.
 
-config DEBUG_INFO
-	bool "Compile Xen with debug info"
-	default y
-	---help---
-	  If you say Y here the resulting Xen will include debugging info
-	  resulting in a larger binary image.
-
 config FRAME_POINTER
 	bool "Compile Xen with frame pointers"
 	default DEBUG
@@ -132,4 +125,11 @@ source "arch/$(SRCARCH)/Kconfig.debug"
 
 endif # DEBUG || EXPERT
 
+config DEBUG_INFO
+	bool "Compile Xen with debug info"
+	default DEBUG
+	help
+	  If you say Y here the resulting Xen will include debugging info
+	  resulting in a larger binary image.
+
 endmenu