staging: rtl8723bs: Replace msleep() with fsleep()

staging: rtl8723bs: Replace msleep() with fsleep()

Replace msleep(10) with fsleep(10 * USEC_PER_MSEC)
in _rtw_init_xmit_priv().
fsleep() is the new standard API for delays, as it automatically chooses
the best sleep method based on the duration.

Suggested-by: Ethan Tidmore <ethantidmore06@gmail.com>
Signed-off-by: Marcos Andrade <marcosandrade95963@gmail.com>
Reviewed-by: Ethan Tidmore <ethantidmore06@gmail.com>
Link: https://patch.msgid.link/20260316221924.4904-3-marcosandrade95963@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>