ARM: 7362/1: AMBA: Add module_amba_driver() helper macro for amba_driver

For simple modules that contain a single amba_driver without any
additional setup code then ends up being a block of duplicated
boilerplate. This patch adds a new macro, module_amba_driver(),
which replaces the module_init()/module_exit() registrations with
template functions.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/linux/amba/bus.h

@@ -125,4 +125,13 @@ struct amba_device name##_device = {				\
 	.periphid = id,						\
 }
 
+/*
+ * module_amba_driver() - Helper macro for drivers that don't do anything
+ * special in module init/exit.  This eliminates a lot of boilerplate.  Each
+ * module may only use this macro once, and calling it replaces module_init()
+ * and module_exit()
+ */
+#define module_amba_driver(__amba_drv) \
+	module_driver(__amba_drv, amba_driver_register, amba_driver_unregister)
+
 #endif