Revert "powerpc/watchdog: Don't enable interrupt on PPC64 BookE"

This reverts commit 3978bdb4, now that
critical interrupts are properly supported on ppc64 booke.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Cc: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
Cc: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/booke_wdt.c

@@ -138,14 +138,6 @@ static void __booke_wdt_enable(void *data)
 	val &= ~WDTP_MASK;
 	val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
 
-#ifdef CONFIG_PPC_BOOK3E_64
-	/*
-	 * Crit ints are currently broken on PPC64 Book-E, so
-	 * just disable them for now.
-	 */
-	val &= ~TCR_WIE;
-#endif
-
 	mtspr(SPRN_TCR, val);
 }