Kconfig: update flightly outdated CONFIG_SMP documentation

Remove an outdated reference to "most personal computers" having only one
CPU, and change the use of "singleprocessor" and "single processor" in
CONFIG_SMP's documentation to "uniprocessor" across all arches where that
documentation is present.

Signed-off-by: Robert Graffham <psquid@psquid.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 9063ae6..5438cab 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -128,8 +128,8 @@
 	default n
 	help
 	  This enables support for systems with more than one CPU. If you have
-	  a system with only one CPU, like most personal computers, say N. If
-	  you have a system with more than one CPU, say Y.
+	  a system with only one CPU, say N. If you have a system with more
+	  than one CPU, say Y.
 
 if SMP