spi: spi-zynqmp-gqspi: Fix incorrect indentation

Fixed incorrect indentation in ZynqMP qspi controller driver.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/2b246b6f0925c8a2a767a4240e8738ffeefd62be.1600931476.git.michal.simek@xilinx.com


Signed-off-by: Mark Brown <broonie@kernel.org>