arm64: zynqmp: Set default RTC device at start

For RTC to start to operate there is a need to call the driver. The simple
way to do it is to set default RTC instance which will call the probe and
do basic initialization.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/01155f1555dbd42adc618906629f5fb45754d5a4.1731419926.git.michal.simek@amd.com
diff --git a/board/xilinx/zynqmp/zynqmp_kria.env b/board/xilinx/zynqmp/zynqmp_kria.env
index 927f398..ff3a092 100644
--- a/board/xilinx/zynqmp/zynqmp_kria.env
+++ b/board/xilinx/zynqmp/zynqmp_kria.env
@@ -77,6 +77,7 @@
 tpm_kd240=if test ${card1_rev} = A; then run tpm_reset; fi
 
 board_setup=\
+rtc dev 0; \
 zynqmp mmio_write 0xFFCA0010 0xfff 0; \
 if test ${card1_name} = SCK-KV-G; then run kv260_setup; run tpm_kv260; fi;\
 if test ${card1_name} = SCK-KR-G; then run kr260_setup; run tpm_reset; fi;\