qemu: move qemuDomainDeviceDefValidateController() to qemu_validate.c

Move the function and all its static helper functions.
Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_validate.h

@@ -48,3 +48,6 @@ int qemuValidateDomainDeviceDefHostdev(const virDomainHostdevDef *hostdev,
                                        virQEMUCapsPtr qemuCaps);
 int qemuValidateDomainDeviceDefVideo(const virDomainVideoDef *video,
                                      virQEMUCapsPtr qemuCaps);
+int qemuValidateDomainDeviceDefController(const virDomainControllerDef *controller,
+                                          const virDomainDef *def,
+                                          virQEMUCapsPtr qemuCaps);