$MAKE is automatically set. Don't need to set it explicitly.

Signed-off-by: Grant Likely <grant.likely@arm.com>

Small changes:
- Make tfa-fip the default target
- Don't give U-Boot a replacement DTB
- Add some .PHONY targets

Signed-off-by: Grant Likely <grant.likely@arm.com>

Move the clean target into the top level makefile so that the .config
rule doesn't get called before doing the clean step

Signed-off-by: Grant Likely <grant.likely@arm.com>

There are some options in U-Boot that need to be enabled for EFI
testing. Add them to the defconfig.

Signed-off-by: Grant Likely <grant.likely@arm.com>

Set up a recursive structure so that u-boot defconfig can be run first
and then included in the 2nd stage makefile.

Signed-off-by: Grant Likely <grant.likely@arm.com>

U-Boot defconfig already knows a lot about the platform. Use the
defconfig data to know what the SoC is and start with sane defaults.

This currently works by running the U-Boot defconfig step with a
:=$(shell) statement before executing any make rules. It is a little
ugly to do it this way, and it may be better to recursively call Make
so that the output of make <target>_defconfig is executed in a proper
rule.
Signed-off-by: Grant Likely <grant.likely@arm.com>

The CACHEDIR target was a leftover from an experiment that didn't make
sense. Remove it. Also, add the buildall script to the base directory.

Signed-off-by: Grant Likely <grant.likely@arm.com>

This tool is all about building U-Boot images; so make the TARGET
variable match the name used in the U-Boot config directory.

Signed-off-by: Grant Likely <grant.likely@arm.com>

Fixes previous commits that renamed the manifest and scripts working
directory and changed to using the u-boot target name when choosing
which firmware image to build.

Signed-off-by: Grant Likely <grant.likely@arm.com>

Signed-off-by: Grant Likely <grant.likely@arm.com>

Splitting the individual platforms into separate makefiles simplifies
the build scripts considerably. The Makefile now includes a
platform-specific makefile based on the value of ${TARGET}, and the
included file can override the variables as needed for the
configuration.

Signed-off-by: Grant Likely <grant.likely@arm.com>