ARM: 7881/1: __fixup_smp read of SCU config should do byteswap in BE case

ARM: 7881/1: __fixup_smp read of SCU config should do byteswap in BE case

Commit "317de547b0459ce4cf2ea4eda13c9ac042e0fc51 ARM: 7846/1:
Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices"
added read of SCU config register into __fixup_smp function.
Such read should be followed by byteswap, if kernel runs in
BE mode.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>