arm64: elf: Fix allnoconfig kernel build with !ARCH_USE_GNU_PROPERTY

Commit ab7876a9 ("arm64: elf: Enable BTI at exec based on ELF
program properties") introduced the conditional selection of
ARCH_USE_GNU_PROPERTY if BINFMT_ELF is enabled. With allnoconfig, this
option is no longer selected and the arm64 arch_parse_elf_property()
function clashes with the generic dummy implementation.

Link: http://lkml.kernel.org/r/20200318082830.GA31312@willie-the-truck
Fixes: ab7876a9 ("arm64: elf: Enable BTI at exec based on ELF program properties")
Signed-off-by: NWill Deacon <will@kernel.org>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm64/Kconfig

@@ -64,7 +64,7 @@ config ARM64
 	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
 	select ARCH_KEEP_MEMBLOCK
 	select ARCH_USE_CMPXCHG_LOCKREF
-	select ARCH_USE_GNU_PROPERTY if BINFMT_ELF
+	select ARCH_USE_GNU_PROPERTY
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_SUPPORTS_MEMORY_FAILURE