Input: drv260x - switch to using fsleep()

Switch from udelay() to fsleep() in drv260x_worker() as it runs in a
sleepable workqueue context where busy-waiting is unnecessary.

Assisted-by: LLM
Tested-by: Maurizio Casciano <mauriziocasciano7@gmail.com>
Link: https://patch.msgid.link/apLOXaWFZ8ueIEAm@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>