ppc64/ppc64asm: fix a typo

Change-Id: Iaa0a18315c22124dcc0ee273c129218f6386901d
Reviewed-on: https://go-review.googlesource.com/c/arch/+/194098
Reviewed-by: Toshihiro Shiino <shiino.toshihiro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/ppc64/ppc64asm/inst.go b/ppc64/ppc64asm/inst.go
index bd86b92..870522a 100644
--- a/ppc64/ppc64asm/inst.go
+++ b/ppc64/ppc64asm/inst.go
@@ -238,7 +238,7 @@
 	}
 }
 
-// CondReg is a bit or field in the conditon register.
+// CondReg is a bit or field in the condition register.
 type CondReg int8
 
 const (