[POWERPC] Spelling fixes: arch/ppc/

Spelling fixes in arch/ppc/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc/8xx_io/fec.c b/arch/ppc/8xx_io/fec.c
index 57a9a61..d38335d 100644
--- a/arch/ppc/8xx_io/fec.c
+++ b/arch/ppc/8xx_io/fec.c
@@ -1878,7 +1878,7 @@
 	bdp--;
 	bdp->cbd_sc |= BD_SC_WRAP;
 
-	/* ...and the same for transmmit.
+	/* ...and the same for transmit.
 	*/
 	bdp = fep->tx_bd_base;
 	for (i=0; i<TX_RING_SIZE; i++) {