[fix] fix build error

hotfix for compile error

Merge branch 'feature/sdram_init_flow' into aspeed-dev-v2019.04

[update] examin strap to know if SDRAM has
been initialized.

1. for ast2600, check if SCU100[6]==1 (SDRAM has been initialized) or
not.
2. refactor format

add emmc/sd in ast2600

update

update clk

update

update

fix complie error

re-arrange modify

update

add sd clk

add mac3/4

update for clk in dtsi and update ast2500 uart clk

update uart clk

update ast2600 clk

mv clk info to cpuinfo

modify for mac clk

Merge branch 'ryan_port' into aspeed-dev-v2019.04

update ast2600 clk

[update] revise the default cfg of ast2600 MPLL

update pll

update for reset and clk

update for clk