accessibility: use C99 array init

Use C99 array initializer syntax for consistency with other array
initializers around it and to eliminate a sparse warning:

drivers/accessibility/speakup/main.c:1290:26: sparse: warning: obsolete array initializer, use C99 syntax

Fixes: f43241a ("accessibility: speakup: Specify spk_vars among module parameters")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Mushahid Hussain <mushi.shar@gmail.com>
Cc: William Hubbs <w.d.hubbs@gmail.com>
Cc: Chris Brannon <chris@the-brannons.com>
Cc: Kirk Reiser <kirk@reisers.ca>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: speakup@linux-speakup.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20230501001617.9152-1-rdunlap@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/accessibility/speakup/main.c

@@ -1287,7 +1287,7 @@ static struct var_t spk_vars[NB_ID] = {
 	[PUNC_LEVEL_ID] = { PUNC_LEVEL, .u.n = {NULL, 1, 0, 4, 0, 0, NULL} },
 	[READING_PUNC_ID] = { READING_PUNC, .u.n = {NULL, 1, 0, 4, 0, 0, NULL} },
 	[CURSOR_TIME_ID] = { CURSOR_TIME, .u.n = {NULL, 120, 50, 600, 0, 0, NULL} },
-	[SAY_CONTROL_ID] { SAY_CONTROL, TOGGLE_0},
+	[SAY_CONTROL_ID] = { SAY_CONTROL, TOGGLE_0},
 	[SAY_WORD_CTL_ID] = {SAY_WORD_CTL, TOGGLE_0},
 	[NO_INTERRUPT_ID] = { NO_INTERRUPT, TOGGLE_0},
 	[KEY_ECHO_ID] = { KEY_ECHO, .u.n = {NULL, 1, 0, 2, 0, 0, NULL} },