Add target device as at91-sama5d2_ptc_ek in SAMA5D2 subtarget and
build images for SAMA5D2 PTC Ek board.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

reorganizing at91 subtargets based on sama5 soc features and this fix
below problems.
  1. able to set neon flags to sama5d2 & sama5d4 subtargets.
  2. fix the make clean which removes all the subtargets in bin folder.
  3. able to configure kernel specific to subtarget.
  4. able to set vfpu4 flags to samad3 subtargets.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

Add support for SAMA5D27 SOM1 with target device as at91-sama5d27_som1_ek
in SAMA5 subtarget and build images for SAMA5D27 SOM1 Ek board.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

updating to new version v3.8.10 and copying at91bootstrap.bin to bin folder.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

These packages are needed to generate the image, better mark them hidden
so we will activate them based on which boards gets build and they will
be activated always when the board which needs then gets build.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

It is sufficient to define this in AT91Bootstrap/Default as this is not
used for all.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

The fixes following problems
1. changing prefix at91bootstrap to AT91bootstrap will fix the default
   selection of at91bootstrap for the selected sama5 subtarget.
2. fixed missing default selection of sama5d4 nand flash for the
   selected sama5d4 subtarget.
3. corrected at91bootstrap Title name.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

Added sama5 to BUILD_SUBTARGET variable.This will populate at91bootstrap
menu options in bootloader menu only when SAMA5 devices are selected as
SUBTARGET and to avoid showing up this menu when legacy device is
selected as SUBTARGET and fixed typo mistake: sama5d3 -> sama5d2.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>

at91bootstrap is a second-level bootloader for Microchip(Atmel AT91) SoCs.
It provides a set of algorithms to manage the hardware initialization and
to download the main application or a third-level bootloader(i.e. uboot)
from specified boot media to main memory and execute it.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>