make BINFMT_FLAT a bool

I have not yet seen anyone saying he has a reasonable use case for using
BINFMT_FLAT modular on his embedded device.

Considering that fs/binfmt_flat.c even lacks a MODULE_LICENSE() I really doubt
there is any, and this patch therefore makes BINFMT_FLAT a bool.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Bryan Wu <cooloney.lkml@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/Kconfig.binfmt

diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 853845a..55e8ee1 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -41,7 +41,7 @@
 	  It is also possible to run FDPIC ELF binaries on MMU linux also.
 
 config BINFMT_FLAT
-	tristate "Kernel support for flat binaries"
+	bool "Kernel support for flat binaries"
 	depends on !MMU
 	help
 	  Support uClinux FLAT format binaries.

fs/binfmt_flat.c

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 0498b18..c12cc36 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -932,14 +932,8 @@
 	return register_binfmt(&flat_format);
 }
 
-static void __exit exit_flat_binfmt(void)
-{
-	unregister_binfmt(&flat_format);
-}
-
 /****************************************************************************/
 
 core_initcall(init_flat_binfmt);
-module_exit(exit_flat_binfmt);
 
 /****************************************************************************/