Added support for early SoC configuration which does not belong
conceptually to system initialization. ERASE, JTAG TDI pins are
currently configured here.
Tested on Atmel SMART SAM E70 Xplained board
Origin: Original
Jira: ZEP-978
Change-Id: Id51adddb4c7cce22907af214461d75db83df129a
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>