Added the options calc_checksum to the flash driver.

This was forgotten here. All other LPC targets use
this option.

git-svn-id: svn://svn.berlios.de/openocd/trunk@1906 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/target/target/lpc2148.cfg

@@ -53,4 +53,4 @@ $_TARGETNAME configure -event reset-init {
 }
 
 # flash bank lpc2000 <base> <size> 0 0 <target#> <variant> <clock> [calc_checksum]
-flash bank lpc2000 0x0 0x7d000 0 0 0 lpc2000_v2 14765
+flash bank lpc2000 0x0 0x7d000 0 0 0 lpc2000_v2 14765 calc_checksum