drivers/video/aty/radeon_base.c: fix typo in comment

Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/aty/radeon_base.c

@@ -698,8 +698,8 @@ static void __devinit radeon_get_pllinfo(struct radeonfb_info *rinfo)
 found:
 	/*
 	 * Some methods fail to retrieve SCLK and MCLK values, we apply default
-	 * settings in this case (200Mhz). If that really happne often, we could
-	 * fetch from registers instead...
+	 * settings in this case (200Mhz). If that really happens often, we
+	 * could fetch from registers instead...
 	 */
 	if (rinfo->pll.mclk == 0)
 		rinfo->pll.mclk = 20000;