Currently, only module parameters in loaded modules are exported in
/sys/modules/, while those of "modules" built into the kernel can be set by
the kernel command line, but not read or set via sysfs.

- move module parameters from /sys/modules/$(module_name)/$(parameter_name) to
  /sys/modules/$(module_name)/parameters/$(parameter_name)

- remove dummy kernel_param for exporting refcnt, add "struct module *"-based
  attribute instead

- also export module paramters for "modules" which are built into the kernel,
  so parameters are always accessible at
  /sys/modules/$(KBUILD_MODNAME)/$(parameter_name)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified)
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>