Documentation: remove duplicated words

Remove many duplicated words under Documentation/ and do other small
cleanups.

Examples:
        "and and" --> "and"
        "in in" --> "in"
        "the the" --> "the"
        "the the" --> "to the"
        ...

Signed-off-by: Paolo Ornati <ornati@fastwebnet.it>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/ia64/efirtc.txt b/Documentation/ia64/efirtc.txt
index ede2c1e..057e6be 100644
--- a/Documentation/ia64/efirtc.txt
+++ b/Documentation/ia64/efirtc.txt
@@ -26,7 +26,7 @@
 Because we wanted to minimize the impact on existing user-level apps using
 the CMOS clock, we decided to expose an API that was very similar to the one
 used today with the legacy RTC driver (driver/char/rtc.c). However, because 
-EFI provides a simpler services, not all all ioctl() are available. Also
+EFI provides a simpler services, not all ioctl() are available. Also
 new ioctl()s have been introduced for things that EFI provides but not the 
 legacy.