KVM: MIPS: Setup VZ emulation? directly from kvm_mips_init()

Invoke kvm_mips_emulation_init() directly from kvm_mips_init() instead
of bouncing through kvm_init()=>kvm_arch_init().  Functionally, this is
a glorified nop as invoking kvm_arch_init() is the very first action
performed by kvm_init().

Emptying kvm_arch_init() will allow dropping the hook entirely once all
architecture implementations are nops.

No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221130230934.1014142-23-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/mips/kvm/mips.c

@@ -1012,7 +1012,7 @@ long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
 
 int kvm_arch_init(void *opaque)
 {
-	return kvm_mips_emulation_init();
+	return 0;
 }
 
 void kvm_arch_exit(void)
@@ -1636,6 +1636,10 @@ static int __init kvm_mips_init(void)
 	if (ret)
 		return ret;
 
+	ret = kvm_mips_emulation_init();
+	if (ret)
+		return ret;
+
 	ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
 
 	if (ret)