km/scripts: search for kernel/DTBs at serverip:/PRODUCTNAME via TFTP in develop mode

Search for the kernel and DTBs in a folder named PRODUCTNAME (found in the IVM)
at the TFTP server instead of the u-boot boardname.
Signed-off-by: NTobias Müller <Tobias.Mueller@keymile.com>
Signed-off-by: NValentin Longchamp <valentin.longchamp@keymile.com>
Reviewed-by: NHeiko Schocher <hs@denx.de>

board/keymile/scripts/develop-common.txt

 altbootcmd=run ${subbootcmds}
 bootcmd=run ${subbootcmds}
-configure=run set_uimage; km_setboardid && saveenv && reset
+configure=run set_uimage; setenv tftppath ${IVM_Symbol} ; km_setboardid && saveenv && reset
 subbootcmds=tftpfdt tftpkernel nfsargs add_default boot
 nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}:${toolchain}/${arch}
-tftpfdt=if run set_fdthigh || test ${arch} != arm; then if tftpboot ${fdt_addr_r} ${hostname}/fdt_0x${IVM_BoardId}_0x${IVM_HWKey}.dtb; then; else tftpboot ${fdt_addr_r} ${hostname}/${hostname}.dtb; fi; else true; fi
-tftpkernel=tftpboot ${load_addr_r} ${hostname}/${uimage}
+tftpfdt=if run set_fdthigh || test ${arch} != arm; then if tftpboot ${fdt_addr_r} ${tftppath}/fdt_0x${IVM_BoardId}_0x${IVM_HWKey}.dtb; then; else tftpboot ${fdt_addr_r} ${tftppath}/${hostname}.dtb; fi; else true; fi
+tftpkernel=tftpboot ${load_addr_r} ${tftppath}/${uimage}
 toolchain=/opt/eldk
 rootfssize=0
 set_uimage=printenv uimage || setenv uimage uImage