xen: fix randconfig build problems after introducing SYSCTL

Fix a few randconfig build breakages that started appearing after the
SYSCTL patch series.

First, reintroduce depends on !PV_SHIM_EXCLUSIVE for HVM, as it was
before 568f806cba.

Also, add depends on !PV_SHIM_EXCLUSIVE for SYSCTL, that way the
behavior goes back to what it was before 34317c5082.

Fixes: 568f806cba ("xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"")
Fixes: 34317c5082 ("xen/sysctl: wrap around sysctl hypercall")
Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
CC: jbeulich@suse.com
CC: andrew.cooper3@citrix.com
CC: roger.pau@citrix.com
CC: Penny.Zheng@amd.com

xen/arch/x86/hvm/Kconfig

@@ -1,5 +1,6 @@
 menuconfig HVM
 	bool "HVM support"
+	depends on !PV_SHIM_EXCLUSIVE
 	default !PV_SHIM
 	select COMPAT
 	select IOREQ_SERVER

xen/common/Kconfig

@@ -653,6 +653,7 @@ menu "Supported hypercall interfaces"
 
 config SYSCTL
 	bool "Enable sysctl hypercall"
+	depends on !PV_SHIM_EXCLUSIVE
 	default y
 	help
 	  This option shall only be disabled on some dom0less systems, or