ColdFire: Add Freescale MCF54418TWR ColdFire development board support

Add Freescale MCF54418TWR ColdFire development board support.

Signed-off-by: TsiChung Liew <tsicliew@gmail.com>
Signed-off-by: Jason Jin <Jason.jin@freescale.com>
Signed-off-by: Alison Wang <b18965@freescale.com>
diff --git a/boards.cfg b/boards.cfg
index b14a08f..4c63789 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -380,6 +380,12 @@
 M5329AFEE                    m68k        mcf532x     m5329evb            freescale      -           M5329EVB:NANDFLASH_SIZE=0
 M5329BFEE                    m68k        mcf532x     m5329evb            freescale      -           M5329EVB:NANDFLASH_SIZE=16
 M5373EVB                     m68k        mcf532x     m5373evb            freescale      -           M5373EVB:NANDFLASH_SIZE=16
+M54418TWR                    m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:CF_SBF,SYS_SERIAL_BOOT,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=50000000
+M54418TWR_nand_mii           m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:SYS_NAND_BOOT,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=25000000
+M54418TWR_nand_rmii          m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:SYS_NAND_BOOT,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=50000000
+M54418TWR_nand_rmii_lowfreq  m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:SYS_NAND_BOOT,LOW_MCFCLK,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=50000000
+M54418TWR_serial_mii         m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:CF_SBF,SYS_SERIAL_BOOT,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=25000000
+M54418TWR_serial_rmii        m68k        mcf5445x    m54418twr           freescale      -           M54418TWR:CF_SBF,SYS_SERIAL_BOOT,SYS_TEXT_BASE=0x47E00000,SYS_INPUT_CLKSRC=50000000
 M54451EVB                    m68k        mcf5445x    m54451evb           freescale      -           M54451EVB:SYS_TEXT_BASE=0x00000000,SYS_INPUT_CLKSRC=24000000
 M54451EVB_stmicro            m68k        mcf5445x    m54451evb           freescale      -           M54451EVB:CF_SBF,SYS_STMICRO_BOOT,SYS_TEXT_BASE=0x47e00000,SYS_INPUT_CLKSRC=24000000
 M54455EVB                    m68k        mcf5445x    m54455evb           freescale      -           M54455EVB:SYS_ATMEL_BOOT,SYS_TEXT_BASE=0x04000000,SYS_INPUT_CLKSRC=33333333