MIPS: KVM: Fix unused variable build warning

As kvm_mips_complete_mmio_load() did not yet modify PC at this point
as James Hogans <james.hogan@imgtec.com> explained the curr_pc variable
and the comments along with it can be dropped.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Link: http://lkml.org/lkml/2015/5/8/422
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9993/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kvm/emulate.c

@@ -2389,7 +2389,6 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
 {
 	unsigned long *gpr = &vcpu->arch.gprs[vcpu->arch.io_gpr];
 	enum emulation_result er = EMULATE_DONE;
-	unsigned long curr_pc;
 
 	if (run->mmio.len > sizeof(*gpr)) {
 		kvm_err("Bad MMIO length: %d", run->mmio.len);
@@ -2397,11 +2396,6 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
 		goto done;
 	}
 
-	/*
-	 * Update PC and hold onto current PC in case there is
-	 * an error and we want to rollback the PC
-	 */
-	curr_pc = vcpu->arch.pc;
 	er = update_pc(vcpu, vcpu->arch.pending_load_cause);
 	if (er == EMULATE_FAIL)
 		return er;