Interrupt flag used for message handshake will be required for
stream interrupts, so conditionally compiled code without
HPI6205_NO_HSR_POLL defined can never be used;  removing it.
Signed-off-by: NEliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>