damengine: pxp: fixed compilation warnings

drivers/dma/pxp/pxp_dma_v3.c: In function ‘pxp_2d_task_config’:
drivers/dma/pxp/pxp_dma_v3.c:1449:6: warning: ‘out_fmt’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (rgb_colors[i].format == format)
      ^
drivers/dma/pxp/pxp_dma_v3.c:2323:19: note: ‘out_fmt’ was declared here
  uint32_t in_fmt, out_fmt;
                   ^~~~~~~
drivers/dma/pxp/pxp_dma_v3.c:1449:6: warning: ‘in_fmt’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (rgb_colors[i].format == format)
      ^
drivers/dma/pxp/pxp_dma_v3.c:2323:11: note: ‘in_fmt’ was declared here
  uint32_t in_fmt, out_fmt;
           ^~~~~~

Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@mentor.com>