[Arm-netbook] eoma68 rk3288 testing

[Luke Kenneth Casson Leighton]

after finding various bits of documentation i'm going to be testing
out the following settings, which match the (known, calculated)
impedance of the EOMA68-RK3288 board (around 50-60 ohms instead of
100-120 of the Reference Design):

       http://www.skhynix.com/product/filedata/fileDownload.do?seq=6790
       MR1: bits 9,6,2 = b001 = RZQ/4 = 60 ohms ODT
            bits 4,3   = b00  = CAS disabled
            bits 5,1   = b00  = RZQ/6 = 40 ohms output driver impedance
            bit  7     = 0    = write-leveling disabled
            bit  11    = 0    = TDQS disabled
            bit  12    = 0    = output disabling not enabled
            bit  10    reserved
            bit  8     reserved
       MR2: bits 10,9  = b01  = RZQ/4 = 60 ohms ODT
            bits 6,5,4 = b001 = CAS Write Latency 6
            bits 3,2,1 = b100 = partial array self-refresh 3/4 array