[ARM] arm32ve: arm64: Fix cpu_vcpu_coproc for instruction emulation

The ARM instruction emulation library under arch/arm/cpu/common uses
cpu_vcpu_coproc provided by arm32, arm32ve, and arm64 to determing
coprocessor callbacks.

This patch fixes cpu_vcpu_coproc for arm32ve and arm64 because we now
have CP14 read/write functions available in both these ports.

Signed-off-by: Anup Patel <anup@brainfault.org>