drm/xe/guc: Fix size_t print format

Use %zx format to print size_t to remove the following warning when
building for i386:

>> drivers/gpu/drm/xe/xe_guc_ct.c:1727:43: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat]
1727 | drm_printf(p, "[CTB].length: 0x%lx\n", snapshot->ctb_size);
| ~~~ ^~~~~~~~~~~~~~~~~~
| %zx

Cc: José Roberto de Souza <[e-mail]>
Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-kbuild-all/[e-mail]/
Fixes: 643f209ba3fd ("drm/xe: Make GUC binaries dump consistent with other binaries in devcoredump")
Reviewed-by: Rodrigo Vivi <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Lucas De Marchi <[e-mail]>
(cherry picked from commit 7748289df510638ba61fed86b59ce7d2fb4a194c)
Signed-off-by: Rodrigo Vivi <[e-mail]>

drivers/gpu/drm/xe/xe_guc_ct.c

···
 			   snapshot->g2h_outstanding);
 
 		if (snapshot->ctb) {
-			drm_printf(p, "[CTB].length: 0x%lx\n", snapshot->ctb_size);
+			drm_printf(p, "[CTB].length: 0x%zx\n", snapshot->ctb_size);
 			xe_print_blob_ascii85(p, "[CTB].data", '\n',
 					      snapshot->ctb, 0, snapshot->ctb_size);
 		}

drivers/gpu/drm/xe/xe_guc_log.c

···
 	drm_printf(p, "GuC timestamp: 0x%08llX [%llu]\n", snapshot->stamp, snapshot->stamp);
 	drm_printf(p, "Log level: %u\n", snapshot->level);
 
-	drm_printf(p, "[LOG].length: 0x%lx\n", snapshot->size);
+	drm_printf(p, "[LOG].length: 0x%zx\n", snapshot->size);
 	remain = snapshot->size;
 	for (i = 0; i < snapshot->num_chunks; i++) {
 		size_t size = min(GUC_LOG_CHUNK_SIZE, remain);