Arc: Fix unaligned memory access

Access to unaligned addresses was broken: for read invalid number of
full words was read if both start address and end address are unaligned;
for writes writing of second half word has been broken.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Arc: Fix unaligned 32-bit breakpoints

32-bit breakpoints at unaligned addresses were broken, because
low-level functions has been called, and those functions assume that
whatever alignment is required has already been done. So for example
32-bit writes at unaligned address were passed as one write, instead of
being split at several, according to rules of alignment. This patch
fixes this by using higher level functions that do everything for us.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
ARC: Update docs

It seems pkg-config must be installed starting from Ubuntu 14.04.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
ARC: Add configuration files for DW ARC AXS101

Add configuration files for the DesignWare ARC AXS101 Software Development
Platform:

1. Definition of the JTAG interface embedded into the mainboard.
2. Definition of the AXC001 CPU card.
3. Definition of the mainboard.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
ARC: Add new configurations for EM Starter Kit

Use same board/target hierarchy as in SDP.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
ARC: Update README

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
ARC: Add configuration files for DW ARC AXS102

Board with HS34 and HS36.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>