Add I2C clock divider names

teensy3/kinetis.h

 #define KINETIS_I2C3		(*(KINETIS_I2C_t *)0x400E7000)
 #define I2C0_A1			(KINETIS_I2C0.A1)		// I2C Address Register 1
 #define I2C0_F			(KINETIS_I2C0.F)		// I2C Frequency Divider register
+#define I2C_F_DIV20			((uint8_t)0x00)
+#define I2C_F_DIV22			((uint8_t)0x01)
+#define I2C_F_DIV24			((uint8_t)0x02)
+#define I2C_F_DIV26			((uint8_t)0x03)
+#define I2C_F_DIV28			((uint8_t)0x04)
+#define I2C_F_DIV30			((uint8_t)0x05)
+#define I2C_F_DIV32			((uint8_t)0x09)
+#define I2C_F_DIV34			((uint8_t)0x06)
+#define I2C_F_DIV36			((uint8_t)0x0A)
+#define I2C_F_DIV40			((uint8_t)0x07)
+#define I2C_F_DIV44			((uint8_t)0x0C)
+#define I2C_F_DIV48			((uint8_t)0x0D)
+#define I2C_F_DIV56			((uint8_t)0x0E)
+#define I2C_F_DIV64			((uint8_t)0x12)
+#define I2C_F_DIV68			((uint8_t)0x0F)
+#define I2C_F_DIV72			((uint8_t)0x13)
+#define I2C_F_DIV80			((uint8_t)0x14)
+#define I2C_F_DIV88			((uint8_t)0x15)
+#define I2C_F_DIV96			((uint8_t)0x19)
+#define I2C_F_DIV104			((uint8_t)0x16)
+#define I2C_F_DIV112			((uint8_t)0x1A)
+#define I2C_F_DIV128			((uint8_t)0x17)
+#define I2C_F_DIV144			((uint8_t)0x1C)
+#define I2C_F_DIV160			((uint8_t)0x1D)
+#define I2C_F_DIV192			((uint8_t)0x1E)
+#define I2C_F_DIV224			((uint8_t)0x22)
+#define I2C_F_DIV240			((uint8_t)0x1F)
+#define I2C_F_DIV256			((uint8_t)0x23)
+#define I2C_F_DIV288			((uint8_t)0x24)
+#define I2C_F_DIV320			((uint8_t)0x25)
+#define I2C_F_DIV384			((uint8_t)0x26)
+#define I2C_F_DIV480			((uint8_t)0x27)
+#define I2C_F_DIV448			((uint8_t)0x2A)
+#define I2C_F_DIV512			((uint8_t)0x2B)
+#define I2C_F_DIV576			((uint8_t)0x2C)
+#define I2C_F_DIV640			((uint8_t)0x2D)
+#define I2C_F_DIV768			((uint8_t)0x2E)
+#define I2C_F_DIV896			((uint8_t)0x32)
+#define I2C_F_DIV960			((uint8_t)0x2F)
+#define I2C_F_DIV1024			((uint8_t)0x33)
+#define I2C_F_DIV1152			((uint8_t)0x34)
+#define I2C_F_DIV1280			((uint8_t)0x35)
+#define I2C_F_DIV1536			((uint8_t)0x36)
+#define I2C_F_DIV1920			((uint8_t)0x37)
+#define I2C_F_DIV1792			((uint8_t)0x3A)
+#define I2C_F_DIV2048			((uint8_t)0x3B)
+#define I2C_F_DIV2304			((uint8_t)0x3C)
+#define I2C_F_DIV2560			((uint8_t)0x3D)
+#define I2C_F_DIV3072			((uint8_t)0x3E)
+#define I2C_F_DIV3840			((uint8_t)0x3F)
+//#define I2C_F_DIV28			((uint8_t)0x08)
+//#define I2C_F_DIV40			((uint8_t)0x0B)
+//#define I2C_F_DIV48			((uint8_t)0x10)
+//#define I2C_F_DIV56			((uint8_t)0x11)
+//#define I2C_F_DIV80			((uint8_t)0x18)
+//#define I2C_F_DIV128			((uint8_t)0x1B)
+//#define I2C_F_DIV160			((uint8_t)0x20)
+//#define I2C_F_DIV192			((uint8_t)0x21)
+//#define I2C_F_DIV320			((uint8_t)0x28)
+//#define I2C_F_DIV384			((uint8_t)0x29)
+//#define I2C_F_DIV640			((uint8_t)0x30)
+//#define I2C_F_DIV768			((uint8_t)0x31)
+//#define I2C_F_DIV1280			((uint8_t)0x38)
+//#define I2C_F_DIV1536			((uint8_t)0x39)
 #define I2C0_C1			(KINETIS_I2C0.C1)		// I2C Control Register 1
 #define I2C_C1_IICEN			((uint8_t)0x80)			// I2C Enable
 #define I2C_C1_IICIE			((uint8_t)0x40)			// I2C Interrupt Enable