ARM: S3C24XX: remove unneeded "config SMDK2440_CPU2442"

The Kconfig entry for SMDK2440_CPU2442 was moved from one Kconfig file
to another in commit acf2d41d ("ARM: S3C24XX: Move mach-s3c2440/
pll into mach-s3c24xx/"). In that move it also lost its statement to
select CPU_S3C2442. That was not needed anymore because it now depended
on that same symbol.

But without its select this entry became a nop: enabling it has no
effect, as it changes no code. It can safely be removed.

Fix a related, and trivial, comment typo too.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c24xx/Kconfig

@@ -661,10 +661,7 @@ config MACH_RX1950
 	help
 	   Say Y here if you're using HP iPAQ rx1950
 
-config SMDK2440_CPU2442
-	bool "SMDM2440 with S3C2442 CPU module"
-
-endif	# CPU_S3C2440
+endif	# CPU_S3C2442
 
 if CPU_S3C2443 || CPU_S3C2416