x86/elf: Make loading of 32bit processes depend on ia32_enabled()

Major aspect of ia32 emulation is the ability to load 32bit processes.
That's currently decided (among others) by compat_elf_check_arch().

Make the macro use ia32_enabled() to decide if IA32 compat is
enabled before loading a 32bit process.

Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230623111409.3047467-5-nik.borisov@suse.com