tegra: drop console specifiers from kernel commad line

Because recent changes to procd, last "console" argument was used as
primary argument and causing no terminal to be spawned on serial
interface. So drop the hardcoded consoles in boot script, since dts has
already an alias specified, which lets procd decide where to spawn the
terminal.

Signed-off-by: Tomasz Maciej Nowak <[email protected]>

target/linux/tegra/image/generic-bootscript

@@ -1,6 +1,6 @@
 part uuid ${devtype} ${devnum}:2 ptuuid
 
-setenv bootargs "root=PARTUUID=${ptuuid} rw rootwait console=ttyS0,115200 console=tty0"
+setenv bootargs "root=PARTUUID=${ptuuid} rw rootwait"
 
 load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} zImage
 load ${devtype} ${devnum}:${bootpart} ${fdt_addr_r} ${soc}-${board}.dtb