ALSA: emu10k1: omit non-applicable mixer controls for E-MU cards

The E-MU cards don't try very hard to be Sound Blasters. All sound I/O
goes through the Hana FPGA, thus making the regular extin/out controls
useless. Still showing them just serves to clutter up the interface and
confuse the user.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230514170323.3408834-5-oswald.buddenhagen@gmx.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emufx.c

@@ -1379,7 +1379,7 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
 		snd_emu10k1_init_stereo_control(&controls[nctl++], "EMU Capture Volume", gpr, 0);
 		gpr_map[gpr + 2] = 0x00000000;
 		gpr += 3;
-	}
+	} else {
 		/* AC'97 Playback Volume - used only for mic (renamed later) */
 		A_ADD_VOLUME_IN(stereo_mix, gpr, A_EXTIN_AC97_L);
 		A_ADD_VOLUME_IN(stereo_mix+1, gpr+1, A_EXTIN_AC97_R);
@@ -1460,6 +1460,7 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
 						emu->card_capabilities->ac97_chip ? "Aux2 Capture Volume" : "Aux Capture Volume",
 						gpr, 0);
 		gpr += 2;
+	}
 	
 	/* Stereo Mix Front Playback Volume */
 	A_OP(icode, &ptr, iMAC0, A_GPR(playback), A_GPR(playback), A_GPR(gpr), A_GPR(stereo_mix));
@@ -1580,19 +1581,6 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
 	snd_emu10k1_init_mono_control(&controls[nctl++], "Wave Master Playback Volume", gpr, 0);
 	gpr++;
 
-	/* analog speakers */
-	A_PUT_STEREO_OUTPUT(A_EXTOUT_AFRONT_L, A_EXTOUT_AFRONT_R, playback);
-	A_PUT_STEREO_OUTPUT(A_EXTOUT_AREAR_L, A_EXTOUT_AREAR_R, playback+2);
-	A_PUT_OUTPUT(A_EXTOUT_ACENTER, playback+4);
-	A_PUT_OUTPUT(A_EXTOUT_ALFE, playback+5);
-	if (emu->card_capabilities->spk71)
-		A_PUT_STEREO_OUTPUT(A_EXTOUT_ASIDE_L, A_EXTOUT_ASIDE_R, playback+6);
-
-	/* headphone */
-	A_PUT_STEREO_OUTPUT(A_EXTOUT_HEADPHONE_L, A_EXTOUT_HEADPHONE_R, playback);
-
-	/* digital outputs */
-	/* A_PUT_STEREO_OUTPUT(A_EXTOUT_FRONT_L, A_EXTOUT_FRONT_R, playback + SND_EMU10K1_PLAYBACK_CHANNELS); */
 	if (emu->card_capabilities->emu_model) {
 		/* EMU1010 Outputs from PCM Front, Rear, Center, LFE, Side */
 		dev_info(emu->card->dev, "EMU outputs on\n");
@@ -1603,7 +1591,17 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
 				A_OP(icode, &ptr, iACC3, A_EMU32OUTL(z), A_GPR(playback + z), A_C_00000000, A_C_00000000);
 			}
 		}
-	}
+	} else {
+		/* analog speakers */
+		A_PUT_STEREO_OUTPUT(A_EXTOUT_AFRONT_L, A_EXTOUT_AFRONT_R, playback);
+		A_PUT_STEREO_OUTPUT(A_EXTOUT_AREAR_L, A_EXTOUT_AREAR_R, playback+2);
+		A_PUT_OUTPUT(A_EXTOUT_ACENTER, playback+4);
+		A_PUT_OUTPUT(A_EXTOUT_ALFE, playback+5);
+		if (emu->card_capabilities->spk71)
+			A_PUT_STEREO_OUTPUT(A_EXTOUT_ASIDE_L, A_EXTOUT_ASIDE_R, playback+6);
+
+		/* headphone */
+		A_PUT_STEREO_OUTPUT(A_EXTOUT_HEADPHONE_L, A_EXTOUT_HEADPHONE_R, playback);
 
 		/* IEC958 Optical Raw Playback Switch */
 		gpr_map[gpr++] = 0;
@@ -1634,6 +1632,7 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input))
 		A_PUT_STEREO_OUTPUT(A_EXTOUT_REAR_L, A_EXTOUT_REAR_R, playback+2);
 		A_PUT_OUTPUT(A_EXTOUT_CENTER, playback+4);
 		A_PUT_OUTPUT(A_EXTOUT_LFE, playback+5);
+	}
 
 	/* ADC buffer */
 #ifdef EMU10K1_CAPTURE_DIGITAL_OUT