From 3db9e86029349c2c84928b5a0f7c7cf324243b4f Mon Sep 17 00:00:00 2001
From: Soren Brinkmann <soren.brinkmann@xilinx.com>
Date: Wed, 17 Jul 2013 10:10:15 -0700
Subject: [PATCH] arm: zynq: slcr: Use read-modify-write for register writes

zynq_slcr_cpu_start/stop() ignored the current register state when
writing to a register. Fixing this by implementing proper
read-modify-write.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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