feat(rd1ae): add Generic Timer in device tree

Add a node for AP_REFCLK Non-Secure Generic Timer in device tree, which
acts as a system timer to fix the failure of SystemReady IR ACS BSA
test case 402.

Refer to https://github.com/ARM-software/bsa-acs/blob/v23.09_REL1.0.6\
/docs/arm_bsa_testcase_checklist.rst?plain=1#L115
for more information.

Signed-off-by: Ziad Elhanafy <ziad.elhanafy@arm.com>
Signed-off-by: David Hu <david.hu2@arm.com>
Change-Id: I3e63a5ecfd8c6211f917ca3844b8b7bda208d83a
1 file changed