arm64/ima: add ima_arch support

Add arm64 IMA arch support. The code and arch policy is mainly inherited
from x86.
Co-developed-by: NChester Lin <clin@suse.com>
Signed-off-by: NChester Lin <clin@suse.com>
Acked-by: NMimi Zohar <zohar@linux.ibm.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NArd Biesheuvel <ardb@kernel.org>

arch/arm64/Kconfig

@@ -1849,6 +1849,7 @@ config EFI
 	select EFI_RUNTIME_WRAPPERS
 	select EFI_STUB
 	select EFI_GENERIC_STUB
+	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
 	default y
 	help
 	  This option provides support for runtime services provided