arm64: Update MIDR definitions for Arm Cortex-A cores

Add the MIDR definition for Arm Cortex-A55 and Cortex-A35

Change-Id: I0729e9b6e305d45da7ea8e98c9b8b0f518f1c1bf
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Patch-mainline: linux-arm-kernel @ 01/16/2018, 10:23
[kyan@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Kyle Yan <kyan@codeaurora.org>