This patch will rename the board name from "fvp_rd_kronos_cortex_r82"
to "fvp_rd_kronos_safety_island" and also rename all occurrences of
"fvp_rd_kronos_cortex_r82" to "fvp_rd_kronos_safety_island" in the code
base.

Signed-off-by: Rahul Singh <rahul.singh@arm.com>