Fix misspellings of "system", "controller", "interrupt" and "necessary".

Fix the various misspellings of "system", controller", "interrupt" and
"[un]necessary".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index 8038f28..d887c05 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -1654,7 +1654,7 @@
 					panic_queues(dev);
 				}
 #endif
-				/* pass BD to controler */
+				/* pass BD to controller */
 #ifndef TC35815_USE_PACKEDBUFFER
 				if (!lp->rx_skbs[curid].skb) {
 					lp->rx_skbs[curid].skb =
@@ -1694,7 +1694,7 @@
 		}
 #endif
 		for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
-			/* pass FD to controler */
+			/* pass FD to controller */
 #ifdef DEBUG
 			lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
 #else