board/rde1edge: rename sgiclarkh to rde1edge

Replace all usage of 'sgiclark' with 'rdn1e1edge' and 'sgiclarkh' with
'rde1edge' as per the updated product names.

Change-Id: I14e9b0332851798531de21d70eb54f1e5557a7bd
Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
8 files changed