arm: mach-pxa: amend Kconfig after mtdchar merge

The mtdchar module was merged with the mtdcore module, which means that the
MTD_CHAR Kconfig symbol does not exist any more.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 86eec41..0e74ba0 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -160,7 +160,6 @@
 	select MTD
 	select MTD_CFI
 	select MTD_CFI_INTELEXT
-	select MTD_CHAR
 	select MTD_PHYSMAP
 	select PXA25x
 	select SMC91X