Input: ti_am335x_tsc - remove redundant assignment to variable config

The variable config is being initialized with a value that is never
read, it is being re-assigned in the next statement. The initialization
is redundant and can be removed.

Cleans up clang scan build warning:
drivers/input/touchscreen/ti_am335x_tsc.c:160:2: warning: Value stored
to 'config' is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20240205215940.1851349-1-colin.i.king@gmail.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/ti_am335x_tsc.c

@@ -157,7 +157,6 @@ static void titsc_step_config(struct titsc *ts_dev)
 			     n++ == 0 ? STEPCONFIG_OPENDLY : 0);
 	}
 
-	config = 0;
 	config = STEPCONFIG_MODE_HWSYNC |
 			STEPCONFIG_AVG_16 | ts_dev->bit_yn |
 			STEPCONFIG_INM_ADCREFM;