ARC: no cmd_kgdb support

Signed-off-by: Frank Dols <frank.dols@synopsys.com>
ARC: no jtag console

Signed-off-by: Frank Dols <frank.dols@synopsys.com>
ARC: added definition of "inX"/"outX" symbols used in Xilinx System Ace CF-card driver.

In Xilinx System Ace CF-card driver there're 2 PPC-specific symbols
"in16" and "out16". In ARC we haven't had them up until now. So as
discussed here:
http://lists.denx.de/pipermail/u-boot/2013-January/143336.html
Impleneted missing in our architecture symbols.


Signed-off-by: Frank Dols <frank.dols@synopsys.com>
ARC: added missing "else" in "ace_writew"

System ACE compact flash controller supports either 8-bit (default) or
16-bit data transfers. And in corresponding driver we need to implement
read/write of 16-bit data words properly for both modes of operation.

In existing code if width==8 both branches get executed which may cause
unexpected behavior of SystemAce controller.

Addition of "else" fixes described issue and execution is done as
expected for both (8-bit and 16-bit) data bus widths.

Signed-off-by: Frank Dols <frank.dols@synopsys.com>
ARC: remove display and usb stuff

Signed-off-by: Frank Dols <frank.dols@synopsys.com>
ARC: rework supported commands as on HAPS51 and ML509

Signed-off-by: Frank Dols <frank.dols@synopsys.com>