dmaengine: pl08x: Suppress spaces in indentation

Removed checkpatch reported spaces in indentation:
ERROR: code indent should use tabs where possible
+^I         PL080_CONFIG_TC_IRQ_MASK);$
Signed-off-by: Leonardo Carreras <leocarreras89@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>