mx53loco: Disable printing cpuinfo

mx53loco: Disable printing cpuinfo

Since commit 32df39c741788e ("mx5: fix get_reset_cause") we have the following
boot messages on a mx53qsb:

U-Boot 2015.04-rc5-00029-gd68df02 (Apr 06 2015 - 11:15:39)

CPU:   Freescale i.MX53 rev2.1 at 800 MHz
Reset cause: POR
Board: MX53 LOCO
I2C:   ready
DRAM:  1 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
CPU:   Freescale i.MX53 rev2.1 at 1000 MHz
Reset cause: unknown reset
Net:   FEC [PRIME]

The CPU and Reset cause lines appear twice.

Initially mx53 boots at 800MHz, then at a later point the PMIC is configured via
I2C to raise the CPU voltage so that it can run at 1GHz.

To avoid such misleading double printings, disable printing cpu info for now.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Jason Liu <r64343@freescale.com>