Rework TFTF AArch64 entry point code

 - Share architectural initialization code between the cold and warm
   boot code.

 - Split EL1 from EL2 setup code.

 - Fully initialize SCTLR rather than relying on its reset value.

Change-Id: I7c1e4db9a2091dc4604115800333db6f780827d7
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
1 file changed