ssb: Do not disable PCI host on non-Mips

After upgrading an old laptop to 4.15-rc9, I found that the eth0 and
wlan0 interfaces had disappeared.  It turns out that the b43 and b44
drivers require SSB_PCIHOST_POSSIBLE which depends on
PCI_DRIVERS_LEGACY, a config option that only exists on Mips.

Fixes: 58eae141 ("ssb: Disable PCI host for PCI_DRIVERS_GENERIC")
Cc: stable@vger.org
Signed-off-by: NSven Joachim <svenjoac@gmx.de>
Reviewed-by: NJames Hogan <jhogan@kernel.org>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/ssb/Kconfig

@@ -32,7 +32,7 @@ config SSB_BLOCKIO
 
 config SSB_PCIHOST_POSSIBLE
 	bool
-	depends on SSB && (PCI = y || PCI = SSB) && PCI_DRIVERS_LEGACY
+	depends on SSB && (PCI = y || PCI = SSB) && (PCI_DRIVERS_LEGACY || !MIPS)
 	default y
 
 config SSB_PCIHOST