MIPS: KVM: Remove dead code in CP0 emulation

The code to check whether rd > MIPS_CP0_DESAVE is dead code, since
MIPS_CP0_DESAVE = 31 and rd is already masked with 0x1f. Remove it.

Signed-off-by: James Hogan <[e-mail]>
Cc: Ralf Baechle <[e-mail]>
Cc: Gleb Natapov <[e-mail]>
Cc: Paolo Bonzini <[e-mail]>
Cc: Sanjay Lal <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Paolo Bonzini <[e-mail]>

arch/mips/kvm/kvm_mips_emul.c

···
 	sel = inst & 0x7;
 	co_bit = (inst >> 25) & 1;
 
-	/* Verify that the register is valid */
-	if (rd > MIPS_CP0_DESAVE) {
-		printk("Invalid rd: %d\n", rd);
-		er = EMULATE_FAIL;
-		goto done;
-	}
-
 	if (co_bit) {
 		op = (inst) & 0xff;