southbridge/amd amd81XX, cs553X & sr5650 spelling fixes

Trivial fixes, but the editor highlights them, and it's easy to go
through a bunch of files while I'm otherwise idle.

Change-Id: Ice5d8ce9408356c866a9a2ee5a03f704f55ddc2a
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7842
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/southbridge/amd/sr5650/sr5650.c b/src/southbridge/amd/sr5650/sr5650.c
index 2a2d558..84d6d9a 100644
--- a/src/southbridge/amd/sr5650/sr5650.c
+++ b/src/southbridge/amd/sr5650/sr5650.c
@@ -410,7 +410,7 @@
 				       (dev->enabled ? 0 : 1) << (7 + dev_ind));
 		if (dev->enabled)
 			sr5650_gpp_sb_init(nb_dev, dev, dev_ind);
-		/* Dont call disable_pcie_bar3(nb_dev) here, otherwise the screen will crash. */
+		/* Don't call disable_pcie_bar3(nb_dev) here, otherwise the screen will crash. */
 		break;
 	case 11:
 	case 12:	/* bus 0, dev 11,12, GPP2 */