am335x, guardian: set tftp_load_addr in environment

Set tftp_load_addr to 0x82000000 in MEM_LAYOUT_ENV_SETTINGS
Signed-off-by: NMoses Christopher <BollavarapuMoses.Christopher@in.bosch.com>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210611161350.2141-5-Gireesh.Hiremath@in.bosch.com

include/configs/am335x_guardian.h

@@ -29,6 +29,7 @@
 #define MEM_LAYOUT_ENV_SETTINGS \
 	"scriptaddr=0x80000000\0" \
 	"pxefile_addr_r=0x80100000\0" \
+	"tftp_load_addr=0x82000000\0" \
 	"kernel_addr_r=0x82000000\0" \
 	"fdt_addr_r=0x88000000\0" \
 	"ramdisk_addr_r=0x88080000\0" \