Fix trivial typos in Kconfig* files

Fix several typos in help text in Kconfig* files.

Signed-off-by: David Sterba <dave@jikos.cz>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b7cb048..16ecea3 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -956,7 +956,7 @@
 	  byte order. These modes require different kernels and a different
 	  Linux distribution.  In general there is one preferred byteorder for a
 	  particular system but some systems are just as commonly used in the
-	  one or the other endianess.
+	  one or the other endianness.
 
 config CPU_BIG_ENDIAN
 	bool "Big endian"
@@ -1750,7 +1750,7 @@
 	bool
 	default y if SGI_IP27
 	help
-	  Say Y to upport efficient handling of discontiguous physical memory,
+	  Say Y to support efficient handling of discontiguous physical memory,
 	  for architectures which are either NUMA (Non-Uniform Memory Access)
 	  or have huge holes in the physical address space for other reasons.
 	  See <file:Documentation/vm/numa> for more.
@@ -1938,7 +1938,7 @@
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
-	  but it is indepedent of the system firmware.   And like a reboot
+	  but it is independent of the system firmware.   And like a reboot
 	  you can start any kernel with it, not just Linux.
 
 	  The name comes from the similiarity to the exec system call.