ARM64: remove unnecessary architecture-specific <asm/device.h>

arch/arm64/include/asm/device.h is identical to
include/asm-generic/device.h, and therefore the ARM64-specific version
is unnecessary. Remove it.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>

Author: EthanNelson-Moore