build: Don't work around cortex-a8 issues when targeting a9 only

Don't work around cortex-a8 issues when other compiler flags
show we want to target cortex-a9 only

Change-Id: If5a077243fc15298fbcbe2ffc857b5e961dd29da
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
build/core: Fix build errors

- Include task hooks only if they exists
- Fix typos

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
build: Make sure boot.img depends on the kernel having been built

Change-Id: Ia439ed4079ef912c42aa15cac995741fd6071f1e
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
build: edify: fix multiple device assert

Only generate one error message since multiple error message
will trigger a fail if the device does not match the first
assert

Change-Id: I1dc47cce10032eb28bbb808482b5ee9efc3b87bc