Makefile: Fix inclusion of the config-devices.mak.d Kconfig dependencies

The Makefile tries to include device Kconfig dependencies via

 -include $(SUBDIR_DEVICES_MAK_DEP)

and thus expects files that match *-softmmu/config-devices.mak.d ...
however, the minikconf script currently generates files a la
"*-softmmu-config.devices.mak.d" instead, so the dependency files
simply got ignored so far. For example, after a "touch hw/arm/Kconfig",
the arm-softmmu/config-devices.mak file is currently not re-generated.
Fix it by putting the dependency files in the *-softmmu folders now.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

Makefile

@@ -350,7 +350,7 @@ endif
 # This has to be kept in sync with Kconfig.host.
 MINIKCONF_ARGS = \
     $(CONFIG_MINIKCONF_MODE) \
-    $@ $*-config.devices.mak.d $< $(MINIKCONF_INPUTS) \
+    $@ $*/config-devices.mak.d $< $(MINIKCONF_INPUTS) \
     CONFIG_KVM=$(CONFIG_KVM) \
     CONFIG_SPICE=$(CONFIG_SPICE) \
     CONFIG_IVSHMEM=$(CONFIG_IVSHMEM) \

configure

@@ -1832,7 +1832,7 @@ exit 0
 fi
 
 # Remove old dependency files to make sure that they get properly regenerated
-rm -f *-config-devices.mak.d
+rm -f */config-devices.mak.d
 
 if test -z "$python"
 then

docs/devel/kconfig.rst

@@ -299,7 +299,7 @@ and also listed as follows in the top-level Makefile's ``MINIKCONF_ARGS``
 variable::
 
     MINIKCONF_ARGS = \
-      $@ $*-config.devices.mak.d $< $(MINIKCONF_INPUTS) \
+      $@ $*/config-devices.mak.d $< $(MINIKCONF_INPUTS) \
       CONFIG_KVM=$(CONFIG_KVM) \
       CONFIG_SPICE=$(CONFIG_SPICE) \
       CONFIG_TPM=$(CONFIG_TPM) \