Move Acer board detections to the board files
Runtime support for both A510 and A700, part 2

Touchscreen.
Update defconfigs according to the recommended Android config

https://source.android.com/devices/tech/kernel.html
drivers: video: tegra: fix compilation error on Google GCC 4.7

drivers/video/tegra/dc/nvhdcp.c: In function 'nvhdcp_downstream_worker':
drivers/video/tegra/dc/nvhdcp.c:826:9: error: 'b_status' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/video/tegra/dc/nvhdcp.c:782:6: note: 'b_status' was declared here
cc1: all warnings being treated as errors
recovery: use lzma for ramdisk compression (a510 & a700)

Change-Id: I978d70a0b25fb6e6e0018e8c6e44fbe46cdecc8f
This fixes a warning saying:

    warning: #warning "TODO: return_address should use unwind tables"

And, this enables return_address using unwind information. If ARM_UNWIND is
selected, unwind_frame in unwind.c will be called in walk_stackframe.

Signed-off-by: sahara <keun-o.park@windriver.com>
Fix this warning by removing a unneeded use of defined

TIMEC   kernel/timeconst.h
defined(@array) is deprecated at kernel/timeconst.pl line 373.
  	(Maybe you should just omit the defined()?)

Signed-off-by: Peter Foley <pefoley2@verizon.net>
support for gcc 4.9