iopoll: fix function parameter names in read_poll_timeout_atomic()

iopoll: fix function parameter names in read_poll_timeout_atomic()

Correct the function parameter names to avoid kernel-doc warnings
and to emphasize this function is atomic (non-sleeping).

Warning: include/linux/iopoll.h:169 function parameter 'sleep_us' not
 described in 'read_poll_timeout_atomic'
Warning: ../include/linux/iopoll.h:169 function parameter
 'sleep_before_read' not described in 'read_poll_timeout_atomic'

Fixes: 9df8043a546d ("iopoll: Generalize read_poll_timeout() into poll_timeout_us()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patch.msgid.link/20260306221033.2357305-1-rdunlap@infradead.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>