Use the new SYM_DATA, SYM_DATA_START, and SYM_DATA_END* macros for data,
so that the data in the object file look sane:

  Value   Size Type    Bind   Vis      Ndx Name
    0000    10 OBJECT  GLOBAL DEFAULT    3 efi32_boot_gdt
    000a    10 OBJECT  LOCAL  DEFAULT    3 save_gdt
    0014     8 OBJECT  LOCAL  DEFAULT    3 func_rt_ptr
    001c    48 OBJECT  GLOBAL DEFAULT    3 efi_gdt64
    004c     0 OBJECT  LOCAL  DEFAULT    3 efi_gdt64_end

    0000    48 OBJECT  LOCAL  DEFAULT    3 gdt
    0030     0 OBJECT  LOCAL  DEFAULT    3 gdt_end
    0030     8 OBJECT  LOCAL  DEFAULT    3 efi_config
    0038    49 OBJECT  GLOBAL DEFAULT    3 efi32_config
    0069    49 OBJECT  GLOBAL DEFAULT    3 efi64_config

All have correct size and type now.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Allison Randal <allison@lohutok.net>
Cc: Cao jin <caoj.fnst@cn.fujitsu.com>
Cc: Enrico Weigelt <info@metux.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: linux-arch@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Huang <wei@redhat.com>
Cc: x86-ml <x86@kernel.org>
Cc: Xiaoyao Li <xiaoyao.li@linux.intel.com>
Link: https://lkml.kernel.org/r/20191011115108.12392-13-jslaby@suse.cz