powerpc/powernv: Fix minor off-by-one error in opal_mce_check_early_recovery()

Fix off-by-one error in opal_mce_check_early_recovery() when checking
whether the NIP falls within OPAL space.

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powernv/opal.c

@@ -548,7 +548,7 @@ bool opal_mce_check_early_recovery(struct pt_regs *regs)
 		goto out;
 
 	if ((regs->nip >= opal.base) &&
-			(regs->nip <= (opal.base + opal.size)))
+			(regs->nip < (opal.base + opal.size)))
 		recover_addr = find_recovery_address(regs->nip);
 
 	/*