parisc/firmware: Use PDC constants for narrow/wide firmware

PDC uses the PDC_MODEL_OS64 and PDC_MODEL_OS32 constants, so use
those constants for the internal WIDE_FIRMWARE/NARROW_FIRMWARE too.
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/kernel/firmware.c

@@ -78,12 +78,12 @@ static unsigned long pdc_result[NUM_PDC_RESULT]  __aligned(8);
 static unsigned long pdc_result2[NUM_PDC_RESULT] __aligned(8);
 
 #ifdef CONFIG_64BIT
-#define WIDE_FIRMWARE 0x1
-#define NARROW_FIRMWARE 0x2
+#define WIDE_FIRMWARE		PDC_MODEL_OS64
+#define NARROW_FIRMWARE		PDC_MODEL_OS32
 
-/* Firmware needs to be initially set to narrow to determine the 
+/* Firmware needs to be initially set to narrow to determine the
  * actual firmware width. */
-int parisc_narrow_firmware __ro_after_init = 2;
+int parisc_narrow_firmware __ro_after_init = NARROW_FIRMWARE;
 #endif
 
 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
@@ -166,10 +166,10 @@ void set_firmware_width_unlocked(void)
 	if (pdc_result[0] != NARROW_FIRMWARE)
 		parisc_narrow_firmware = 0;
 }
-	
+
 /**
  * set_firmware_width - Determine if the firmware is wide or narrow.
- * 
+ *
  * This function must be called before any pdc_* function that uses the
  * convert_to_wide function.
  */
@@ -178,7 +178,7 @@ void set_firmware_width(void)
 	unsigned long flags;
 
 	/* already initialized? */
-	if (parisc_narrow_firmware != 2)
+	if (parisc_narrow_firmware != NARROW_FIRMWARE)
 		return;
 
 	spin_lock_irqsave(&pdc_lock, flags);