[ARM] pxa: initialise SSP earlier

Initialise the SSP driver at arch_initcall() time, so it's available
for other drivers to use it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/ssp.c

@@ -524,7 +524,7 @@ static void __exit pxa_ssp_exit(void)
 	platform_driver_unregister(&pxa27x_ssp_driver);
 }
 
-module_init(pxa_ssp_init);
+arch_initcall(pxa_ssp_init);
 module_exit(pxa_ssp_exit);
 
 EXPORT_SYMBOL(ssp_write_word);