ARM: kirkwood: nsa310: cleanup includes and unneeded code

After removing the unneeded linux/i2c.h, linux/of.h was needed for
of_machine_is_compatible().  i2c.h had included of.h.
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/mach-kirkwood/board-nsa310.c

@@ -12,10 +12,8 @@
 #include <linux/init.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
-
-#include <asm/mach-types.h>
-#include <asm/mach/arch.h>
 #include <mach/kirkwood.h>
+#include <linux/of.h>
 #include "common.h"
 #include "mpp.h"
 
@@ -79,14 +77,10 @@ static void __init nsa310_gpio_init(void)
 
 void __init nsa310_init(void)
 {
-	u32 dev, rev;
-
 	kirkwood_mpp_conf(nsa310_mpp_config);
 
 	nsa310_gpio_init();
 
-	kirkwood_pcie_id(&dev, &rev);
-
 	i2c_register_board_info(0, ARRAY_AND_SIZE(nsa310_i2c_info));
 }