x86/ioremap: Fix CONFIG_EFI=n build
In order to use efi_mem_type(), one needs CONFIG_EFI enabled. Otherwise that function is undefined. Use IS_ENABLED() to check and avoid the ifdeffery as the compiler optimizes away the following unreachable code then. Fixes: 985e537a ("x86/ioremap: Map EFI runtime services data as encrypted for SEV") Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Tested-by: Randy Dunlap <rdunlap@infradead.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: <stable@vger.kernel.org> Link: https://lkml.kernel.org/r/7561e981-0d9b-d62c-0ef2-ce6007aff1ab@infradead.org
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