UAPI: Remove the objhdr-y export list

	=== 7 Kbuild syntax for exported headers

		--- 7.1 header-y

		--- 7.2 objhdr-y

		--- 7.2 genhdr-y

		--- 7.3 destination-y

		--- 7.4 generic-y

	Subdirectories are visited before their parent directories.

	--- 7.2 objhdr-y

	--- 7.2 genhdr-y

	objhdr-y specifies generated files to be exported.

	genhdr-y specifies generated files to be exported.

	Generated files are special as they need to be looked

	up in another directory when doing 'make O=...' builds.

		Example:

			#include/linux/Kbuild

			objhdr-y += version.h

			genhdr-y += version.h

	--- 7.3 destination-y

#

# header-y  - list files to be installed. They are preprocessed

#             to remove __KERNEL__ section of the file

# objhdr-y  - Same as header-y but for generated files

# genhdr-y  - Same as objhdr-y but in a generated/ directory

# genhdr-y  - Same as header-y but in a generated/ directory

#

# ==========================================================================

# all headers files for this dir

header-y      := $(filter-out $(generic-y), $(header-y))

all-files     := $(header-y) $(objhdr-y) $(genhdr-y) $(wrapper-files)

all-files     := $(header-y) $(genhdr-y) $(wrapper-files)

input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \

                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y)) \

                 $(addprefix $(objtree)/$(gen)/,$(genhdr-y))

output-files  := $(addprefix $(install)/, $(all-files))

                            file$(if $(word 2, $(all-files)),s))

      cmd_install = \

        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \

        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \

        $(PERL) $< $(objtree)/$(gen) $(install) $(SRCARCH) $(genhdr-y); \

        for F in $(wrapper-files); do                                   \

                echo "\#include <asm-generic/$$F>" > $(install)/$$F;    \