arm: zynq: Fix types in ps7_spl_init

The patch is fixing the following Warning:
arch/arm/mach-zynq/ps7_spl_init.c:133:24: warning: comparison between
signed and unsigned integer expressions [-Wsign-compare]
    while (ioread(addr) < delay)
                        ^

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
1 file changed