FogBugz #161193: Enhancing "bridge_enable_handoff" command

Bridge_enable_handoff command is used to enable all the bridges
based on handoff values. It took place after the FPGA programming.
This enhancement will remove all memory display commands as
they will trigger data abort if user press enter many times
after run bridge_enable_handoff.

The data abort is caused by U-Boot memory display features which
will auto increment the address after user press enter later on.
When this happen, the memory display command will display next
address which are not a valid address and causing data abort.

Signed-off-by: Chin Liang See <clsee@altera.com>
FogBugz #163901: Display message when watchdog is enabled

This is to display a message at UART terminal when the watchdog
is enabled. It will remind user the possibility of system reset
caused by watchdog timeout.

Signed-off-by: Chin Liang See <clsee@altera.com>
FogBugz #161845: Fix build error when SDRAM ECC disabled and FAT enabled

To fix the build error during the comhination where SDRAM ECC is
disabled and Preloader FAT support is enabled. The SDRAM ECC padding
is not required when the SDRAM ECC is disabled.

Signed-off-by: Chin Liang See <clsee@altera.com>
FogBugz #158322: Adding Spansion flash support

This is to enable the Spansion flash support for QSPI boot. The MTD
SPI driver will auto call the Spansion flash driver when the detected
flash is Spansion flash. It is part of default configuration now as
some customers are using Spansion flash.

Signed-off-by: Chin Liang See <clsee@altera.com>