[ALSA] cmipci - Allow to disable integrated FM port

The driver didn't allow to disable the integrated FM port (if available),
and this annoyed people who don't want FM port.  Now fm_port=0 disables
the FM port unconditionally.  fm_port=1 is used for enabling the integrated
FM port (as default).
Also fixed the documentation about this option.
Fix ALSA bug#2491.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

Documentation/sound/alsa/ALSA-Configuration.txt

@@ -370,7 +370,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     mpu_port	- 0x300,0x310,0x320,0x330 = legacy port,
 		  1 = integrated PCI port,
 		  0 = disable (default)
-    fm_port     - 0x388 (default), 0 = disable (default)
+    fm_port     - 0x388 = legacy port,
+		  1 = integrated PCI port (default),
+		  0 = disable
     soft_ac3    - Software-conversion of raw SPDIF packets (model 033 only)
                   (default = 1)
     joystick_port - Joystick port address (0 = disable, 1 = auto-detect)