ALSA: pcxhr.h replace signed one-bit bitfields

The usage and comments make it clear values of 1/0 were intended
rather than -1/0

Noticed by sparse:
sound/pci/pcxhr/pcxhr.h:100:20: error: dubious one-bit signed bitfield
sound/pci/pcxhr/pcxhr.h:101:22: error: dubious one-bit signed bitfield
sound/pci/pcxhr/pcxhr.h:102:24: error: dubious one-bit signed bitfield
sound/pci/pcxhr/pcxhr.h:103:21: error: dubious one-bit signed bitfield
sound/pci/pcxhr/pcxhr.h:104:25: error: dubious one-bit signed bitfield
sound/pci/pcxhr/pcxhr.h:105:20: error: dubious one-bit signed bitfield
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/pcxhr/pcxhr.h

@@ -97,12 +97,12 @@ struct pcxhr_mgr {
 	int capture_chips;
 	int fw_file_set;
 	int firmware_num;
-	int is_hr_stereo:1;
-	int board_has_aes1:1;	/* if 1 board has AES1 plug and SRC */
-	int board_has_analog:1;	/* if 0 the board is digital only */
-	int board_has_mic:1;	/* if 1 the board has microphone input */
-	int board_aes_in_192k:1;/* if 1 the aes input plugs do support 192kHz */
-	int mono_capture:1;	/* if 1 the board does mono capture */
+	unsigned int is_hr_stereo:1;
+	unsigned int board_has_aes1:1;	/* if 1 board has AES1 plug and SRC */
+	unsigned int board_has_analog:1; /* if 0 the board is digital only */
+	unsigned int board_has_mic:1; /* if 1 the board has microphone input */
+	unsigned int board_aes_in_192k:1;/* if 1 the aes input plugs do support 192kHz */
+	unsigned int mono_capture:1; /* if 1 the board does mono capture */
 
 	struct snd_dma_buffer hostport;