board: phytec: phycore_am6xx: Update scriptaddr

board: phytec: phycore_am6xx: Update scriptaddr

After switching our boards to standard boot, we observed that the
kernel hangs when booting with the "script" boot method over the
network.

The original scriptaddr value was copied from ti_common.env and
remained unused for some time. On phycore-am62x and phycore-am62ax,
however, this address conflicts with the current location where
ATF is loaded (CONFIG_K3_ATF_LOAD_ADDR).

Move scriptaddr to 0x89100000, directly after fdtoverlay_addr_r.
The phycore-am64x is not affected by this issue, but we update it
as well to keep all phycore-am6xx boards consistent.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Reviewed-by: Anshul Dalal <anshuld@ti.com>