docs/config: Set the "kvm" accelerator via "[accel]" section

Configuring the accelerator should nowadays be done via the "-accel"
command line parameter, and thus via the "[accel]" section in config
files. We also need this change for the upcoming qtests that will
use these config files, since the qtests are already using "-accel"
for setting the "qtest" accelerator and QEMU does not like mixing
"-accel ..." and "-machine accel=...".

Message-Id: <20230228211533.201837-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/config/mach-virt-graphical.cfg

@@ -56,9 +56,11 @@
 
 [machine]
   type = "virt"
-  accel = "kvm"
   gic-version = "host"
 
+[accel]
+  accel = "kvm"
+
 [memory]
   size = "1024"
 

docs/config/mach-virt-serial.cfg

@@ -62,9 +62,11 @@
 
 [machine]
   type = "virt"
-  accel = "kvm"
   gic-version = "host"
 
+[accel]
+  accel = "kvm"
+
 [memory]
   size = "1024"
 

docs/config/q35-emulated.cfg

@@ -61,6 +61,8 @@
 
 [machine]
   type = "q35"
+
+[accel]
   accel = "kvm"
 
 [memory]

docs/config/q35-virtio-graphical.cfg

@@ -55,6 +55,8 @@
 
 [machine]
   type = "q35"
+
+[accel]
   accel = "kvm"
 
 [memory]

docs/config/q35-virtio-serial.cfg

@@ -60,6 +60,8 @@
 
 [machine]
   type = "q35"
+
+[accel]
   accel = "kvm"
 
 [memory]