board: phytec: phycore_am62x: Add Network/SPI Boot

Include the boot logic to boot via Network or from a OSPI/QSPI
NOR flash. Moreover, set all required variables to both boot
methods to the environment.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
diff --git a/board/phytec/phycore_am62x/phycore_am62x.env b/board/phytec/phycore_am62x/phycore_am62x.env
index 046bbd2..711ca30 100644
--- a/board/phytec/phycore_am62x/phycore_am62x.env
+++ b/board/phytec/phycore_am62x/phycore_am62x.env
@@ -1,5 +1,7 @@
 #include <env/ti/k3_dfu.env>
 #include <env/phytec/k3_mmc.env>
+#include <env/phytec/k3_net.env>
+#include <env/phytec/k3_spi.env>
 
 fdtaddr=0x88000000
 loadaddr=0x82000000
@@ -15,3 +17,9 @@
 mmcpart=1
 console=ttyS2,115200n8
 earlycon=ns16550a,mmio32,0x02800000
+
+get_cmd=tftp
+
+spi_fdt_addr=0x700000
+spi_image_addr=0x800000
+spi_ramdisk_addr=0x1e00000