kconfig: include common Kconfig files from top-level Kconfig

Instead of duplicating the source statements in every architecture just
do it once in the toplevel Kconfig file.

Note that with this the inclusion of arch/$(SRCARCH/Kconfig moves out of
the top-level Kconfig into arch/Kconfig so that don't violate ordering
constraits while keeping a sensible menu structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/openrisc/Kconfig

@@ -72,10 +72,6 @@ config LOCKDEP_SUPPORT
 config MULTI_IRQ_HANDLER
 	def_bool y
 
-source "init/Kconfig"
-
-source "kernel/Kconfig.freezer"
-
 menu "Processor type and features"
 
 choice
@@ -148,7 +144,6 @@ config SMP
 
 source kernel/Kconfig.hz
 source kernel/Kconfig.preempt
-source "mm/Kconfig"
 
 config OPENRISC_NO_SPR_SR_DSX
 	bool "use SPR_SR_DSX software emulation" if OR1K_1200
@@ -207,24 +202,6 @@ endmenu
 
 endmenu
 
-menu "Executable file formats"
-
-source "fs/Kconfig.binfmt"
-
-endmenu
-
-source "net/Kconfig"
-
-source "drivers/Kconfig"
-
-source "fs/Kconfig"
-
-source "security/Kconfig"
-
-source "crypto/Kconfig"
-
-source "lib/Kconfig"
-
 menu "Kernel hacking"
 
 source "lib/Kconfig.debug"