fsl-ddr: clean up the ddr code for DDR3 controller

- The DDR3 controller is expanding the bits for timing config
- Add the DDR3 32-bit bus mode support

Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>

include/asm-ppc/fsl_ddr_sdram.h

@@ -34,7 +34,10 @@ typedef ddr2_spd_eeprom_t generic_spd_eeprom_t;
 #elif defined(CONFIG_FSL_DDR3)
 #define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR	(3)	/* FIXME */
 typedef ddr3_spd_eeprom_t generic_spd_eeprom_t;
+#ifndef CONFIG_FSL_SDRAM_TYPE
+#define CONFIG_FSL_SDRAM_TYPE	SDRAM_TYPE_DDR3
 #endif
+#endif	/* #if defined(CONFIG_FSL_DDR1) */
 
 /* define bank(chip select) interleaving mode */
 #define FSL_DDR_CS0_CS1			0x40