KVM: s390/pci: fix include duplicates

remove the duplicate includes. While at it sort the includes.
Reported-by: kernel test robot <yujie.liu@intel.com>
Fixes: 73f91b00 ("KVM: s390: pci: enable host forwarding of Adapter Event Notifications")
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>

arch/s390/kvm/pci.h

@@ -10,11 +10,10 @@
 #ifndef __KVM_S390_PCI_H
 #define __KVM_S390_PCI_H
 
-#include <linux/kvm_host.h>
-#include <linux/pci.h>
-#include <linux/mutex.h>
 #include <linux/kvm.h>
 #include <linux/kvm_host.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
 #include <asm/airq.h>
 #include <asm/cpu.h>