powerpc/p1010rdb: fix calculating ddr_freq_mhz

There was a bug for calculating ddr_freq_mhz,
it should be divided by 1000000 rather than 0x1000000.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>
1 file changed