MIPS: ralink: mt7621: Fix soc_device introduction

Depending on selected SMP config options soc_device didn't get
initialised at all. With UP config vmlinux didn't link because
of missing soc bus.

Fixes: 71b9b5e0 ("MIPS: ralink: mt7621: introduce 'soc_device' initialization")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Tested-by: René van Dorst <opensource@vdorst.com>

arch/mips/ralink/Kconfig

@@ -52,6 +52,7 @@ choice
 		select COMMON_CLK
 		select CLKSRC_MIPS_GIC
 		select HAVE_PCI if PCI_MT7621
+		select SOC_BUS
 endchoice
 
 choice

arch/mips/ralink/mt7621.c

@@ -243,12 +243,12 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
 
 	rt2880_pinmux_data = mt7621_pinmux_data;
 
+	soc_dev_init(soc_info, rev);
+
 	if (!register_cps_smp_ops())
 		return;
 	if (!register_cmp_smp_ops())
 		return;
 	if (!register_vsmp_smp_ops())
 		return;
-
-	soc_dev_init(soc_info, rev);
 }