Fix typos in Documentation/: 'F'-'G'

This patch fixes typos in various Documentation txts. The patch addresses
some words starting with the letters 'F'-'G'.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt
index 5ff6fe55..2095a27 100644
--- a/Documentation/s390/s390dbf.txt
+++ b/Documentation/s390/s390dbf.txt
@@ -11,7 +11,7 @@
 (e.g. device drivers) can have one separate debug log.
 One purpose of this is to inspect the debug logs after a production system crash
 in order to analyze the reason for the crash.
-If the system still runs but only a subcomponent which uses dbf failes,
+If the system still runs but only a subcomponent which uses dbf fails,
 it is possible to look at the debug logs on a live system via the Linux
 debugfs filesystem.
 The debug feature may also very useful for kernel and driver development.