defconfigs: dra7xx_hs_evm: Move OPTEE load address to avoid overlaps

Move the OPTEE load address to 0xbdb00000 in order to avoid
overlap with the memory regions used in radio and RVC usecases.

Signed-off-by: Misael Lopez Cruz <misael.lopez@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>