Fix FTM_CONF register bitfield defs

teensy3/kinetis.h

 #define FTM0_CONF		(*(volatile uint32_t *)0x40038084) // Configuration
 #define FTM_CONF_GTBEOUT		0x400				// Global Time Base Output
 #define FTM_CONF_GTBEEN			0x200				// Global Time Base Enable
-#define FTM_CONF_BDMMODE		(((n) & 3) << 6)		// Behavior when in debug mode
-#define FTM_CONF_NUMTOF			(((n) & 31) << 0)		// ratio of counter overflows to TOF bit set
+#define FTM_CONF_BDMMODE(n)		(((n) & 3) << 6)		// Behavior when in debug mode
+#define FTM_CONF_NUMTOF(n)		(((n) & 31) << 0)		// ratio of counter overflows to TOF bit set
 #define FTM0_FLTPOL		(*(volatile uint32_t *)0x40038088) // FTM Fault Input Polarity
 #define FTM_FLTPOL_FLT3POL		0x08				// Fault Input 3 Polarity
 #define FTM_FLTPOL_FLT2POL		0x04				// Fault Input 2 Polarity