Patch merged into coreboot/master: ipq806x/storm: Return NULL for cbmem_top if DRAM is not initialized

the following patch was just integrated into master:
commit cf9e0bc6a62b38a3046fa898b04720ae2572c116
Author: Furquan Shaikh 
Date:   Mon Mar 28 13:29:33 2016 -0700

ipq806x/storm: Return NULL for cbmem_top if DRAM is not initialized

DRAM initialization on storm requires ipq blobs to be
    loaded from cbfs. vboot_locator first checks cbmem_find to see if cbmem is
    initialized and contains selected region info, else it falls back to
    vboot work buffer.

Since cbmem_find calls into cbmem_top to identify the location of
    cbmem area, board/chipset is expected to return NULL until the backing
    store is ready, which in this case until DRAM is initialized in
    romstage, return NULL for cbmem_top.

Change-Id: I1880ce61dcfdabaa527d7a6dcc3482dfe5d5fd17
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/14182
    Reviewed-by: Aaron Durbin 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/14182 for details.

-gerrit