ARM: KVM: Remove __weak attributes

Now that the old code is long gone, we can remove all the weak
attributes, as there is only one version of the code.

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

arch/arm/kvm/hyp/switch.c

@@ -191,7 +191,7 @@ again:
 	return exit_code;
 }
 
-__alias(__guest_run) int __weak __kvm_vcpu_run(struct kvm_vcpu *vcpu);
+__alias(__guest_run) int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
 
 static const char * const __hyp_panic_string[] = {
 	[ARM_EXCEPTION_RESET]      = "\nHYP panic: RST   PC:%08x CPSR:%08x",