staging: board: Initialize staging board code earlier

Currently the staging board code is initialized from a late_initcall().
However, unused PM domains are also disabled from a late_initcall(),
which happens before due to link order.

Change the initialization of staging board code from using
late_initcall() to device_initcall() to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/board/board.h

@@ -15,6 +15,6 @@ static int __init runtime_board_check(void)	\
 	return 0;				\
 }						\
 						\
-late_initcall(runtime_board_check)
+device_initcall(runtime_board_check)
 
 #endif /* __BOARD_H__ */