media: staging: atomisp: get rid of an unused var

As warned:
	drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c:8085 create_host_regular_capture_pipeline() error: uninitialized symbol 'frm'.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c

@@ -8044,7 +8044,6 @@ create_host_regular_capture_pipeline(struct ia_css_pipe *pipe)
 	}
 
 	if (mode == IA_CSS_CAPTURE_MODE_PRIMARY) {
-		unsigned int frm;
 		struct ia_css_frame *local_in_frame = NULL;
 		struct ia_css_frame *local_out_frame = NULL;