[MIPS] MEM_SDREFCFG is not defined for Alchemy DB1550 (compile fail)

["Alon Bar-Lev" <alon.barlev@xxxxxxxxx>]

Hello,

When I have:
CONFIG_MIPS_DB1550
CONFIG_SOC_AU1550
CONFIG_SOC_AU1X00
CONFIG_PM

MEM_SDREFCFG is used at:
arch/mips/au1000/common/power.c::pm_do_freq()

While the MEM_SDREFCFG constant is declare only for CONFIG_SOC_AU1000,
CONFIG_SOC_AU1500, CONFIG_SOC_AU1100 at:
include/asm-mips/mach-au1x00/au1000.h

Maybe MEM_SDREFCFG should be defined for CONFIG_SOC_AU1X00?
Or there should be #ifdef for its usage in power.c?

Best Regards,
Alon Bar-Lev.