staging: comedi: ni_stc.h: tidy up NI_M_PLL_STATUS_REG bits

Rename the CamelCase and convert the enum into defines. Use the BIT()
macro to define the bits.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_mio_common.c

@@ -4740,7 +4740,7 @@ static int ni_mseries_set_pll_master_clock(struct comedi_device *dev,
 	devpriv->clock_source = source;
 	/* it seems to typically take a few hundred microseconds for PLL to lock */
 	for (i = 0; i < timeout; ++i) {
-		if (ni_readw(dev, NI_M_PLL_STATUS_REG) & MSeries_PLL_Locked_Bit)
+		if (ni_readw(dev, NI_M_PLL_STATUS_REG) & NI_M_PLL_STATUS_LOCKED)
 			break;
 		udelay(1);
 	}

drivers/staging/comedi/drivers/ni_stc.h

@@ -991,6 +991,7 @@ static const struct comedi_lrange range_ni_E_ao_ext;
 #define NI_M_PLL_MAX_MULTIPLIER		0x100
 #define NI_M_PLL_CTRL_MULTIPLIER(x)	(((x) & 0xff) << 0)
 #define NI_M_PLL_STATUS_REG		0x1c8
+#define NI_M_PLL_STATUS_LOCKED		BIT(0)
 #define NI_M_PFI_OUT_SEL_REG(x)		(0x1d0 + ((x) * 2))
 #define NI_M_PFI_DI_REG			0x1dc
 #define NI_M_PFI_DO_REG			0x1de
@@ -1007,10 +1008,6 @@ static const struct comedi_lrange range_ni_E_ao_ext;
 #define NI_M_STATIC_AI_CTRL_REG(x)	((x) ? (0x260 + (x)) : 0x064)
 #define NI_M_AO_REF_ATTENUATION_REG(x)	(0x264 + (x))
 
-enum MSeries_PLL_Status {
-	MSeries_PLL_Locked_Bit = 0x1
-};
-
 enum MSeries_AI_Config_FIFO_Bypass_Bits {
 	MSeries_AI_Bypass_Channel_Mask = 0x7,
 	MSeries_AI_Bypass_Bank_Mask = 0x78,