drm/i915/guc: Clean up zero initializers

Just use a simple {} to zero initialize arrays/structs instead
of the hodgepodge of stuff we are using currently.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231012122442.15718-4-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/gt/uc/intel_guc_capture.c

@@ -1101,8 +1101,8 @@ guc_capture_create_prealloc_nodes(struct intel_guc *guc)
 static int
 guc_capture_extract_reglists(struct intel_guc *guc, struct __guc_capture_bufstate *buf)
 {
-	struct guc_state_capture_group_header_t ghdr = {0};
-	struct guc_state_capture_header_t hdr = {0};
+	struct guc_state_capture_group_header_t ghdr = {};
+	struct guc_state_capture_header_t hdr = {};
 	struct __guc_capture_parsed_output *node = NULL;
 	struct guc_mmio_reg *regs = NULL;
 	int i, numlists, numregs, ret = 0;