Fix typo.

From-SVN: r10522

gcc/config/m88k/m88k.md

@@ -2812,7 +2812,7 @@
 ;; for divide-by-zero or take your chances.  If the div instruction is
 ;; used, the O/S must complete the operation if the operands are
 ;; negative.  The O/S will signal an overflow condition if the most
-;; negative number (-214783648) is divided by negative 1.
+;; negative number (-2147483648) is divided by negative 1.
 ;;
 ;; There is an unfounded silicon errata for E.1 requiring that an
 ;; immediate constant value in div/divu/mul instructions be less than