[PATCH] ssb: host_soc depends on sprom

Arnd Bergmann [off-list ref] writes:

Drivers that use the SSB sprom functionality typically 'select SSB_SPROM'
from Kconfig, but CONFIG_SSB_HOST_SOC misses this, which results in
a build failure unless at least one of the other drivers that selects
it is enabled:

drivers/built-in.o: In function `ssb_host_soc_get_invariants':
(.text+0x459494): undefined reference to `ssb_fill_sprom_with_fallback'

This adds the same select statement that is used elsewhere.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 541c9a84cd85 ("ssb: pick SoC invariants code from MIPS BCM47xx arch")
---
I'm not sure who the right person is to pick up the fix. The patch that
introduced the problem was merged by Kalle through the iwlwifi tree.

I can take it. For historical reasons ssb patches go through my
wireless-drivers trees.

-- 
Kalle Valo