[ALSA] cmipci: do not check for integrated FM/MIDI ports with chip version 37

Integrated MPU-401/OPL3 ports are available with chip version 39 and
later, so we do not test for the port with version 37.
Now that the test is known to work, we can again enable the MIDI port by
default.

Signed-off-by: Clemens Ladisch <[e-mail]>
Signed-off-by: Jaroslav Kysela <[e-mail]>

Documentation/sound/alsa/ALSA-Configuration.txt

···
 
     Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
 
-    mpu_port    - port address of MIDI interface:
+    mpu_port    - port address of MIDI interface (8338 only):
 		  0x300,0x310,0x320,0x330 = legacy port,
-		  1 = integrated PCI port (8738 or later),
 		  0 = disable (default)
     fm_port     - port address of OPL-3 FM synthesizer (8x38 only):
 		  0x388 = legacy port,

Documentation/sound/alsa/CMIPCI.txt

···
 MIDI CONTROLLER
 ---------------
 
-The MPU401-UART interface is disabled as default.  You need to set
-module option "mpu_port" with a valid I/O port address to enable the
-MIDI support.  The valid I/O ports are 0x300, 0x310, 0x320 and 0x330.
-Choose the value which doesn't conflict with other cards.  With
-CMI8738 and newer chips, you can use "mpu_port=1" to use a PCI port
-address that does not conflict with any other card.
+With CMI8338 chips, the MPU401-UART interface is disabled as default.
+You need to set the module option "mpu_port" to a valid I/O port address
+to enable MIDI support.  Valid I/O ports are 0x300, 0x310, 0x320 and
+0x330.  Choose a value that doesn't conflict with other cards.
+
+With CMI8738 and newer chips, the MIDI interface is enabled by default
+and the driver automatically chooses a port address.
 
 There is _no_ hardware wavetable function on this chip (except for
 OPL3 synth below).

sound/pci/cmipci.c

···
 	if (!fm_port)
 		goto disable_fm;
 
-	if (cm->chip_version > 33) {
+	if (cm->chip_version >= 39) {
 		/* first try FM regs in PCI port range */
 		iosynth = cm->iobase + CM_REG_FM_PCI;
 		err = snd_opl3_create(cm->card, iosynth, iosynth + 2,
···
 		return err;
 	}
 
-	val = 0;
-	if (cm->chip_version > 33 && mpu_port[dev] == 1) {
+	if (cm->chip_version >= 39) {
 		val = snd_cmipci_read_b(cm, CM_REG_MPU_PCI + 1);
 		if (val != 0x00 && val != 0xff) {
 			iomidi = cm->iobase + CM_REG_MPU_PCI;
···
 		}
 	}
 	if (!integrated_midi) {
+		val = 0;
 		iomidi = mpu_port[dev];
 		switch (iomidi) {
 		case 0x320: val = CM_VMPU_320; break;