zynqmp: Fix CSU ID SVD mask fo getting chip ID
zynqmp: Fix CSU ID SVD mask fo getting chip ID

This patch corrects the SVD mask for getting chip ID
using 0xe is wrong and 0x7 is correct.

Signed-off-by: Siva Durga Prasad Paladugu <dae690d6a537d42a9fa58f3d5609802716a124e0@xilinx.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware