drm/i915/dsi: Replace check with a (missing) MIPI sequence name

Names of the MIPI sequence steps are sequential and defined, no
need to check for the gaps. However in seq_name the MIPI_SEQ_END
is missing. Add it there, and drop unneeded NULL check in
sequence_name().
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231103201831.1037416-9-andriy.shevchenko@linux.intel.com

drivers/gpu/drm/i915/display/intel_dsi_vbt.c

@@ -653,6 +653,7 @@ static const fn_mipi_elem_exec exec_elem[] = {
  */
 
 static const char * const seq_name[] = {
+	[MIPI_SEQ_END] = "MIPI_SEQ_END",
 	[MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET",
 	[MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP",
 	[MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON",
@@ -668,7 +669,7 @@ static const char * const seq_name[] = {
 
 static const char *sequence_name(enum mipi_seq seq_id)
 {
-	if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
+	if (seq_id < ARRAY_SIZE(seq_name))
 		return seq_name[seq_id];
 
 	return "(unknown)";