drm/i915: Code cleanup patch to fix checkpatch errors

This cleans up the checkpatch errors for the merged commit -

commit d3b542fcfc72d7724585e3fd2c5e75351bc3df47
Author: Shobhit Kumar <shobhit.kumar@intel.com>
Date:   Mon Apr 14 11:00:34 2014 +0530

    drm/i915: Add parsing support for new MIPI blocks in VBT

Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_bios.c

@@ -643,13 +643,15 @@ static u8 *goto_next_sequence(u8 *data, int *size)
 			 * skip by this element payload size
 			 * skip elem id, command flag and data type
 			 */
-			if ((tmp = tmp - 5) < 0)
+			tmp -= 5;
+			if (tmp < 0)
 				return NULL;
 
 			data += 3;
 			len = *((u16 *)data);
 
-			if ((tmp = tmp - len) < 0)
+			tmp -= len;
+			if (tmp < 0)
 				return NULL;
 
 			/* skip by len */
@@ -657,13 +659,15 @@ static u8 *goto_next_sequence(u8 *data, int *size)
 			break;
 		case MIPI_SEQ_ELEM_DELAY:
 			/* skip by elem id, and delay is 4 bytes */
-			if ((tmp = tmp - 5) < 0)
+			tmp -= 5;
+			if (tmp < 0)
 				return NULL;
 
 			data += 5;
 			break;
 		case MIPI_SEQ_ELEM_GPIO:
-			if ((tmp = tmp - 3) < 0)
+			tmp -= 3;
+			if (tmp < 0)
 				return NULL;
 
 			data += 3;