arm: zynq: Enable debug uart on Zedboard

It helps with debugging.
Signed-off-by: NSiva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

configs/zynq_zed_defconfig

@@ -4,6 +4,7 @@ CONFIG_SYS_TEXT_BASE=0x4000000
 CONFIG_SPL=y
 CONFIG_SPL_STACK_R_ADDR=0x200000
 CONFIG_DEFAULT_DEVICE_TREE="zynq-zed"
+CONFIG_DEBUG_UART=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_FIT_SIGNATURE=y
@@ -47,6 +48,9 @@ CONFIG_PHY_MARVELL=y
 CONFIG_PHY_REALTEK=y
 CONFIG_PHY_XILINX=y
 CONFIG_ZYNQ_GEM=y
+CONFIG_DEBUG_UART_ZYNQ=y
+CONFIG_DEBUG_UART_BASE=0xe0001000
+CONFIG_DEBUG_UART_CLOCK=50000000
 CONFIG_ZYNQ_SERIAL=y
 CONFIG_ZYNQ_QSPI=y
 CONFIG_USB=y