arm64: dts: increase the QSPI reg address for Stratix10 and Agilex

This patch increases the reg addresses for QSPI boot and QSPI rootfs for
Stratix10 and Agilex to cater for the increased size of kernel Image.

Signed-off-by: Joyce Ooi <joyce.ooi@intel.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>